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Sample records for marine navigational aids

  1. 46 CFR 131.910 - Notices to mariners and aids to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Notices to mariners and aids to navigation. 131.910... OPERATIONS Miscellaneous § 131.910 Notices to mariners and aids to navigation. Each master and mate shall... Imagery and Mapping Agency regarding aids to navigation in the area in which the vessel operates....

  2. 46 CFR 131.910 - Notices to mariners and aids to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Notices to mariners and aids to navigation. 131.910... OPERATIONS Miscellaneous § 131.910 Notices to mariners and aids to navigation. Each master and mate shall... Imagery and Mapping Agency regarding aids to navigation in the area in which the vessel operates....

  3. 46 CFR 131.910 - Notices to mariners and aids to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Notices to mariners and aids to navigation. 131.910... OPERATIONS Miscellaneous § 131.910 Notices to mariners and aids to navigation. Each master and mate shall... Imagery and Mapping Agency regarding aids to navigation in the area in which the vessel operates....

  4. 46 CFR 131.910 - Notices to mariners and aids to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Notices to mariners and aids to navigation. 131.910... OPERATIONS Miscellaneous § 131.910 Notices to mariners and aids to navigation. Each master and mate shall... Imagery and Mapping Agency regarding aids to navigation in the area in which the vessel operates....

  5. 46 CFR 131.910 - Notices to mariners and aids to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Notices to mariners and aids to navigation. 131.910... OPERATIONS Miscellaneous § 131.910 Notices to mariners and aids to navigation. Each master and mate shall... Geospatial-Intelligence Agency regarding aids to navigation in the area in which the vessel operates....

  6. 46 CFR 167.65-45 - Notice to mariners; aids to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Notice to mariners; aids to navigation. 167.65-45... PUBLIC NAUTICAL SCHOOL SHIPS Special Operating Requirements § 167.65-45 Notice to mariners; aids to... Coast Guard and the National Imagery and Mapping Agency regarding aids to navigation, and neglect to...

  7. 46 CFR 35.20-1 - Notice to mariners; aids to navigation-T/OCLB.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 1 2012-10-01 2012-10-01 false Notice to mariners; aids to navigation-T/OCLB. 35.20-1... § 35.20-1 Notice to mariners; aids to navigation—T/OCLB. (a) Licensed officers are required to acquaint... Agency regarding aids to navigation, and neglect to do so is evidence of neglect of duty. It is...

  8. 46 CFR 167.65-45 - Notice to mariners; aids to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Notice to mariners; aids to navigation. 167.65-45... PUBLIC NAUTICAL SCHOOL SHIPS Special Operating Requirements § 167.65-45 Notice to mariners; aids to... Coast Guard and the National Imagery and Mapping Agency regarding aids to navigation, and neglect to...

  9. 46 CFR 35.20-1 - Notice to mariners; aids to navigation-T/OCLB.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 1 2014-10-01 2014-10-01 false Notice to mariners; aids to navigation-T/OCLB. 35.20-1... § 35.20-1 Notice to mariners; aids to navigation—T/OCLB. (a) Licensed officers are required to acquaint... Agency regarding aids to navigation, and neglect to do so is evidence of neglect of duty. It is...

  10. 46 CFR 35.20-1 - Notice to mariners; aids to navigation-T/OCLB.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 1 2013-10-01 2013-10-01 false Notice to mariners; aids to navigation-T/OCLB. 35.20-1... § 35.20-1 Notice to mariners; aids to navigation—T/OCLB. (a) Licensed officers are required to acquaint... Agency regarding aids to navigation, and neglect to do so is evidence of neglect of duty. It is...

  11. 46 CFR 167.65-45 - Notice to mariners; aids to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Notice to mariners; aids to navigation. 167.65-45... PUBLIC NAUTICAL SCHOOL SHIPS Special Operating Requirements § 167.65-45 Notice to mariners; aids to... Coast Guard and the National Imagery and Mapping Agency regarding aids to navigation, and neglect to...

  12. 46 CFR 167.65-45 - Notice to mariners; aids to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Notice to mariners; aids to navigation. 167.65-45... PUBLIC NAUTICAL SCHOOL SHIPS Special Operating Requirements § 167.65-45 Notice to mariners; aids to... Coast Guard and the National Geospatial-Intelligence Agency regarding aids to navigation, and neglect...

  13. 46 CFR 35.20-1 - Notice to mariners; aids to navigation-T/OCLB.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 1 2011-10-01 2011-10-01 false Notice to mariners; aids to navigation-T/OCLB. 35.20-1... § 35.20-1 Notice to mariners; aids to navigation—T/OCLB. (a) Licensed officers are required to acquaint... Agency regarding aids to navigation, and neglect to do so is evidence of neglect of duty. It is...

  14. 46 CFR 167.65-45 - Notice to mariners; aids to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Notice to mariners; aids to navigation. 167.65-45... PUBLIC NAUTICAL SCHOOL SHIPS Special Operating Requirements § 167.65-45 Notice to mariners; aids to... Coast Guard and the National Imagery and Mapping Agency regarding aids to navigation, and neglect to...

  15. 46 CFR 35.20-1 - Notice to mariners; aids to navigation-T/OCLB.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Notice to mariners; aids to navigation-T/OCLB. 35.20-1... § 35.20-1 Notice to mariners; aids to navigation—T/OCLB. (a) Licensed officers are required to acquaint... Agency regarding aids to navigation, and neglect to do so is evidence of neglect of duty. It is...

  16. Characteristics of Marine Gravity Anomaly Reference Maps and Accuracy Analysis of Gravity Matching-Aided Navigation

    PubMed Central

    Wang, Hubiao; Chai, Hua; Xiao, Yaofei; Hsu, Houtse; Wang, Yong

    2017-01-01

    The variation of a marine gravity anomaly reference map is one of the important factors that affect the location accuracy of INS/Gravity integrated navigation systems in underwater navigation. In this study, based on marine gravity anomaly reference maps, new characteristic parameters of the gravity anomaly were constructed. Those characteristic values were calculated for 13 zones (105°–145° E, 0°–40° N) in the Western Pacific area, and simulation experiments of gravity matching-aided navigation were run. The influence of gravity variations on the accuracy of gravity matching-aided navigation was analyzed, and location accuracy of gravity matching in different zones was determined. Studies indicate that the new parameters may better characterize the marine gravity anomaly. Given the precision of current gravimeters and the resolution and accuracy of reference maps, the location accuracy of gravity matching in China’s Western Pacific area is ~1.0–4.0 nautical miles (n miles). In particular, accuracy in regions around the South China Sea and Sulu Sea was the highest, better than 1.5 n miles. The gravity characteristic parameters identified herein and characteristic values calculated in various zones provide a reference for the selection of navigation area and planning of sailing routes under conditions requiring certain navigational accuracy. PMID:28796158

  17. 33 CFR 100.45 - Establishment of aids to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Establishment of aids to... SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.45 Establishment of aids to navigation. The District Commander will establish and maintain only those aids to navigation necessary...

  18. 33 CFR 100.45 - Establishment of aids to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Establishment of aids to... SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.45 Establishment of aids to navigation. The District Commander will establish and maintain only those aids to navigation necessary...

  19. 33 CFR 100.45 - Establishment of aids to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Establishment of aids to... SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.45 Establishment of aids to navigation. The District Commander will establish and maintain only those aids to navigation necessary...

  20. 33 CFR 100.45 - Establishment of aids to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Establishment of aids to... SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.45 Establishment of aids to navigation. The District Commander will establish and maintain only those aids to navigation necessary...

  1. 33 CFR 100.45 - Establishment of aids to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Establishment of aids to... SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.45 Establishment of aids to navigation. The District Commander will establish and maintain only those aids to navigation necessary...

  2. Lead-acid batteries in solar photovoltaic power systems for marine aids to navigation

    NASA Astrophysics Data System (ADS)

    Trenchard, S. E.

    1981-10-01

    Since 1974, the U.S. Coast Guard has been testing lead-acid batteries in solar photovoltaic-powered systems for aids to navigation. Three types of lead-acid batteries, distinguished by the composition of their grid material, have been tested: lead-antimony grid, lead-calcium grid, and pure-lead grid. This report contains a comparison of the charging characteristics and the charge-discharge cycling behavior of each grid type. All types were remarkably similar qualitatively in their daily as well as annual cycling behavior but the significance of the quantitative differences offer distinctive tradeoffs. This report presents models for water usage, depth-of-discharge, and post-cycle capacity for various levels of voltage regulation. Based on the post-cycle capacity tests, the effect of grid strength, grid thickness, and operating conditions on life expectancy are presented. A final discussion presents the results of a field deployment of solar photovoltaic-powered aids to navigation in the Miami, Florida area. Potential solutions to the battery terminal corrosion and bird guano problems observed are discussed.

  3. Mariner 9 navigation

    NASA Technical Reports Server (NTRS)

    Neil, W. J.; Jordan, J. F.; Zielenbach, J. W.; Wong, S. K.; Mitchell, R. T.; Webb, W. A.; Koskela, P. E.

    1973-01-01

    A final, comprehensive description of the navigation of Mariner 9-the first U.S. spacecraft to orbit another planet is provided. The Mariner 9 navigation function included not only precision flight path control but also pointing of the spacecraft's scientific instruments mounted on a two degree of freedom scan platform. To the extent appropriate, each section describes the perflight analyses on which the operational strategies and performance predictions were based. Inflight results are then discussed and compared with the preflight predictions. Postflight analyses, which were primarily concerned with developing a thorough understanding of unexpected in-flight results, are also presented.

  4. Testing of solar photovoltaic arrays for utilization on marine aids to navigation

    NASA Astrophysics Data System (ADS)

    Trenchard, S. E.

    1980-11-01

    In 1978, approximately 400 solar photovoltaic arrays were procured and placed at marine exposure facilities in Groton, Connecticut, and Fort Lauderdale, Florida. The arrays were measured quarterly to ascertain the effects of the marine environment on electrical performance. Concurrently, a screening test for photovoltaic arrays to be used in the marine environment was developed at the Coast Guard R and D Center. Identical panels to those on test at the exposure sites were run through the pressure, immersion, and temperature (PIT) screening test. Based on the marine environment exposure test and the PIT screening test, recommendations are made on the constituent materials and construction techniques of solar photovoltaic arrays that are most suited for use in the marine environment.

  5. 46 CFR 122.230 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Report of accident to aid to navigation. 122.230 Section... Marine Casualties and Voyage Records § 122.230 Report of accident to aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the jurisdiction of the Coast Guard, or is connected...

  6. 46 CFR 122.230 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Report of accident to aid to navigation. 122.230 Section... Marine Casualties and Voyage Records § 122.230 Report of accident to aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the jurisdiction of the Coast Guard, or is connected...

  7. 46 CFR 122.230 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Report of accident to aid to navigation. 122.230 Section... Marine Casualties and Voyage Records § 122.230 Report of accident to aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the jurisdiction of the Coast Guard, or is connected...

  8. 46 CFR 122.230 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Report of accident to aid to navigation. 122.230 Section... Marine Casualties and Voyage Records § 122.230 Report of accident to aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the jurisdiction of the Coast Guard, or is connected...

  9. 46 CFR 122.230 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Report of accident to aid to navigation. 122.230 Section... Marine Casualties and Voyage Records § 122.230 Report of accident to aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the jurisdiction of the Coast Guard, or is connected...

  10. 33 CFR 66.10-15 - Aids to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Aids to navigation. 66.10-15 Section 66.10-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Uniform State Waterway Marking System § 66.10-15 Aids to navigation....

  11. 33 CFR 66.10-15 - Aids to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Aids to navigation. 66.10-15 Section 66.10-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Uniform State Waterway Marking System § 66.10-15 Aids to navigation....

  12. 33 CFR 66.10-15 - Aids to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Aids to navigation. 66.10-15 Section 66.10-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Uniform State Waterway Marking System § 66.10-15 Aids to navigation....

  13. 33 CFR 66.10-15 - Aids to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Aids to navigation. 66.10-15 Section 66.10-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Uniform State Waterway Marking System § 66.10-15 Aids to navigation....

  14. 33 CFR 66.10-15 - Aids to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Aids to navigation. 66.10-15 Section 66.10-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Uniform State Waterway Marking System § 66.10-15 Aids to navigation....

  15. 33 CFR 401.54 - Interference with navigation aids.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Interference with navigation aids. 401.54 Section 401.54 Navigation and Navigable Waters SAINT LAWRENCE SEAWAY DEVELOPMENT CORPORATION... with navigation aids. (a) Aids to navigation shall not be interfered with or used as moorings. (b)...

  16. 33 CFR 401.54 - Interference with navigation aids.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Interference with navigation aids. 401.54 Section 401.54 Navigation and Navigable Waters SAINT LAWRENCE SEAWAY DEVELOPMENT CORPORATION... with navigation aids. (a) Aids to navigation shall not be interfered with or used as moorings. (b)...

  17. 33 CFR 67.35-10 - Private aids to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Private aids to navigation. 67.35-10 Section 67.35-10 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES Applications §...

  18. 33 CFR 67.35-10 - Private aids to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Private aids to navigation. 67.35-10 Section 67.35-10 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES Applications §...

  19. 33 CFR 401.54 - Interference with navigation aids.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Interference with navigation aids. 401.54 Section 401.54 Navigation and Navigable Waters SAINT LAWRENCE SEAWAY DEVELOPMENT CORPORATION... with navigation aids. (a) Aids to navigation shall not be interfered with or used as moorings. (b)...

  20. 33 CFR 401.54 - Interference with navigation aids.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 3 2014-07-01 2014-07-01 false Interference with navigation aids. 401.54 Section 401.54 Navigation and Navigable Waters SAINT LAWRENCE SEAWAY DEVELOPMENT CORPORATION... with navigation aids. (a) Aids to navigation shall not be interfered with or used as moorings. (b)...

  1. 33 CFR 401.54 - Interference with navigation aids.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 3 2012-07-01 2012-07-01 false Interference with navigation aids. 401.54 Section 401.54 Navigation and Navigable Waters SAINT LAWRENCE SEAWAY DEVELOPMENT CORPORATION... with navigation aids. (a) Aids to navigation shall not be interfered with or used as moorings. (b)...

  2. 33 CFR 67.35-10 - Private aids to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Private aids to navigation. 67.35-10 Section 67.35-10 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES Applications §...

  3. 33 CFR 67.35-10 - Private aids to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Private aids to navigation. 67.35-10 Section 67.35-10 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES Applications §...

  4. 33 CFR 67.35-10 - Private aids to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Private aids to navigation. 67.35-10 Section 67.35-10 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES Applications §...

  5. 33 CFR 209.325 - Navigation lights, aids to navigation, navigation charts, and related data policy, practices and...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Navigation lights, aids to... ADMINISTRATIVE PROCEDURE § 209.325 Navigation lights, aids to navigation, navigation charts, and related data... procedure to be used by all Corps of Engineers installations and activities in connection with aids...

  6. 33 CFR 209.325 - Navigation lights, aids to navigation, navigation charts, and related data policy, practices and...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 3 2012-07-01 2012-07-01 false Navigation lights, aids to... ADMINISTRATIVE PROCEDURE § 209.325 Navigation lights, aids to navigation, navigation charts, and related data... procedure to be used by all Corps of Engineers installations and activities in connection with aids...

  7. 33 CFR 209.325 - Navigation lights, aids to navigation, navigation charts, and related data policy, practices and...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Navigation lights, aids to... ADMINISTRATIVE PROCEDURE § 209.325 Navigation lights, aids to navigation, navigation charts, and related data... procedure to be used by all Corps of Engineers installations and activities in connection with aids...

  8. 33 CFR 209.325 - Navigation lights, aids to navigation, navigation charts, and related data policy, practices and...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 3 2014-07-01 2014-07-01 false Navigation lights, aids to... ADMINISTRATIVE PROCEDURE § 209.325 Navigation lights, aids to navigation, navigation charts, and related data... procedure to be used by all Corps of Engineers installations and activities in connection with aids...

  9. 33 CFR 209.325 - Navigation lights, aids to navigation, navigation charts, and related data policy, practices and...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Navigation lights, aids to... ADMINISTRATIVE PROCEDURE § 209.325 Navigation lights, aids to navigation, navigation charts, and related data... procedure to be used by all Corps of Engineers installations and activities in connection with aids...

  10. 33 CFR 66.05-100 - Designation of navigable waters as State waters for private aids to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... as State waters for private aids to navigation. 66.05-100 Section 66.05-100 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-100 Designation of navigable waters as State waters for private aids to...

  11. 33 CFR 66.05-100 - Designation of navigable waters as State waters for private aids to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... as State waters for private aids to navigation. 66.05-100 Section 66.05-100 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-100 Designation of navigable waters as State waters for private aids to...

  12. 33 CFR 66.05-100 - Designation of navigable waters as State waters for private aids to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... as State waters for private aids to navigation. 66.05-100 Section 66.05-100 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-100 Designation of navigable waters as State waters for private aids to...

  13. 33 CFR 66.05-100 - Designation of navigable waters as State waters for private aids to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... as State waters for private aids to navigation. 66.05-100 Section 66.05-100 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-100 Designation of navigable waters as State waters for private aids to...

  14. 33 CFR 66.05-100 - Designation of navigable waters as State waters for private aids to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... as State waters for private aids to navigation. 66.05-100 Section 66.05-100 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-100 Designation of navigable waters as State waters for private aids...

  15. Vision-Aided Inertial Navigation

    NASA Technical Reports Server (NTRS)

    Roumeliotis, Stergios I. (Inventor); Mourikis, Anastasios I. (Inventor)

    2017-01-01

    This document discloses, among other things, a system and method for implementing an algorithm to determine pose, velocity, acceleration or other navigation information using feature tracking data. The algorithm has computational complexity that is linear with the number of features tracked.

  16. Gravity aided inertial navigation system (GAINS)

    NASA Astrophysics Data System (ADS)

    Jircitano, Albert; Dosch, Daniel E.

    The paper describes a new autonomous covert INS uniquely suited to underwater applications. Unlike the conventional INS, schuler and siderial errors are bounded without external navigation aids or active instrumentation of ground speed. As a result, the system exhibits excellent long-term navigation performance while maintaining the inherent covertness of the INS system. A conventional INS is integrated with a gravity gradiometer capable of measuring gravity field components independently of platform accelerations. This new integration scheme takes advantage of navigation system velocity error observability. Parametric performance results are presented for GAINS, varying gyro, gravimeter, gradiometer, depth sensor quality, and gravity field activity.

  17. Crew-Aided Autonomous Navigation

    NASA Technical Reports Server (NTRS)

    Holt, Greg N.

    2015-01-01

    A sextant provides manual capability to perform star/planet-limb sightings and offers a cheap, simple, robust backup navigation source for exploration missions independent from the ground. Sextant sightings from spacecraft were first exercised in Gemini and flew as the lost-communication backup for all Apollo missions. This study characterized error sources of navigation-grade sextants for feasibility of taking star and planetary limb sightings from inside a spacecraft. A series of similar studies was performed in the early/mid-1960s in preparation for Apollo missions. This study modernized and updated those findings in addition to showing feasibility using Linear Covariance analysis techniques. The human eyeball is a remarkable piece of optical equipment and provides many advantages over camera-based systems, including dynamic range and detail resolution. This technique utilizes those advantages and provides important autonomy to the crew in the event of lost communication with the ground. It can also provide confidence and verification of low-TRL automated onboard systems. The technique is extremely flexible and is not dependent on any particular vehicle type. The investigation involved procuring navigation-grade sextants and characterizing their performance under a variety of conditions encountered in exploration missions. The JSC optical sensor lab and Orion mockup were the primary testing locations. For the accuracy assessment, a group of test subjects took sextant readings on calibrated targets while instrument/operator precision was measured. The study demonstrated repeatability of star/planet-limb sightings with bias and standard deviation around 10 arcseconds, then used high-fidelity simulations to verify those accuracy levels met the needs for targeting mid-course maneuvers in preparation for Earth reen.

  18. 33 CFR 66.01-50 - Protection of private aids to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Protection of private aids to... SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Aids to Navigation Other Than Federal or State § 66.01-50 Protection of private aids to navigation. Private aids to navigation lawfully maintained...

  19. 33 CFR 66.01-50 - Protection of private aids to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Protection of private aids to... SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Aids to Navigation Other Than Federal or State § 66.01-50 Protection of private aids to navigation. Private aids to navigation lawfully maintained...

  20. 33 CFR 66.01-50 - Protection of private aids to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Protection of private aids to... SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Aids to Navigation Other Than Federal or State § 66.01-50 Protection of private aids to navigation. Private aids to navigation lawfully maintained...

  1. 33 CFR 66.01-50 - Protection of private aids to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Protection of private aids to... SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Aids to Navigation Other Than Federal or State § 66.01-50 Protection of private aids to navigation. Private aids to navigation lawfully maintained...

  2. 33 CFR 66.01-50 - Protection of private aids to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Protection of private aids to... SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Aids to Navigation Other Than Federal or State § 66.01-50 Protection of private aids to navigation. Private aids to navigation lawfully maintained...

  3. Mariner Mars 1971 optical navigation demonstration

    NASA Technical Reports Server (NTRS)

    Born, G. H.; Duxbury, T. C.; Breckenridge, W. G.; Acton, C. H.; Mohan, S.; Jerath, N.; Ohtakay, H.

    1974-01-01

    The feasibility of using a combination of spacecraft-based optical data and earth-based Doppler data to perform near-real-time approach navigation was demonstrated by the Mariner Mars 71 Project. The important findings, conclusions, and recommendations are documented. A summary along with publications and papers giving additional details on the objectives of the demonstration are provided. Instrument calibration and performance as well as navigation and science results are reported.

  4. 75 FR 8390 - St. Croix River Aids to Navigation

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-24

    ... SECURITY Coast Guard St. Croix River Aids to Navigation AGENCY: Coast Guard, DHS. ACTION: Notice of public... the aids to navigation in the St. Croix River. DATES: A public meeting will be held on Tuesday, March... review the current Aids to Navigation system on the St. Croix River and discuss concerns and...

  5. 33 CFR 66.05-35 - Private aids to navigation other than State owned.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Private aids to navigation other... HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-35 Private aids to navigation other than State owned. (a) No person, public body or other instrumentality...

  6. 33 CFR 66.05-25 - Change and modification of State aids to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... aids to navigation. 66.05-25 Section 66.05-25 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-25 Change and modification of State aids to navigation. Wherever a State Administrator determines...

  7. 33 CFR 66.05-35 - Private aids to navigation other than State owned.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Private aids to navigation other... HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-35 Private aids to navigation other than State owned. (a) No person, public body or other instrumentality...

  8. 33 CFR 66.05-25 - Change and modification of State aids to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... aids to navigation. 66.05-25 Section 66.05-25 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-25 Change and modification of State aids to navigation. Wherever a State Administrator determines...

  9. 33 CFR 66.05-35 - Private aids to navigation other than State owned.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Private aids to navigation other... HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-35 Private aids to navigation other than State owned. (a) No person, public body or other instrumentality...

  10. 33 CFR 66.05-25 - Change and modification of State aids to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... aids to navigation. 66.05-25 Section 66.05-25 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-25 Change and modification of State aids to navigation. Wherever a State Administrator determines...

  11. 33 CFR 66.05-35 - Private aids to navigation other than State owned.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Private aids to navigation other... HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-35 Private aids to navigation other than State owned. (a) No person, public body or other instrumentality...

  12. 33 CFR 66.05-25 - Change and modification of State aids to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... aids to navigation. 66.05-25 Section 66.05-25 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-25 Change and modification of State aids to navigation. Wherever a State Administrator determines...

  13. 33 CFR 66.05-25 - Change and modification of State aids to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... aids to navigation. 66.05-25 Section 66.05-25 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-25 Change and modification of State aids to navigation. Wherever a State Administrator determines...

  14. 33 CFR 66.05-35 - Private aids to navigation other than State owned.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Private aids to navigation other... HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-35 Private aids to navigation other than State owned. (a) No person, public body or other instrumentality...

  15. How Do People Use Lighthouses and Navigational Charts? A Marine Education Infusion Unit. Revised Edition.

    ERIC Educational Resources Information Center

    Butzow, John W.; And Others

    Activities concerning navigational charts and aids are presented to help fifth- through ninth-grade students learn about the shape of the sea, its coast, and contours, and about the road signs of the sea which warn against danger and help mariners locate their positions. Teacher background information includes information on marine charts,…

  16. 33 CFR 149.510 - How do I get permission to establish an aid to navigation?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false How do I get permission to establish an aid to navigation? 149.510 Section 149.510 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Aids to Navigation General § 149.510 How do I get permission to establish an aid to navigation? (a...

  17. 33 CFR 149.510 - How do I get permission to establish an aid to navigation?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false How do I get permission to establish an aid to navigation? 149.510 Section 149.510 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Aids to Navigation General § 149.510 How do I get permission to establish an aid to navigation? (a...

  18. 33 CFR 149.510 - How do I get permission to establish an aid to navigation?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false How do I get permission to establish an aid to navigation? 149.510 Section 149.510 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Aids to Navigation General § 149.510 How do I get permission to establish an aid to navigation? (a...

  19. 33 CFR 149.510 - How do I get permission to establish an aid to navigation?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false How do I get permission to establish an aid to navigation? 149.510 Section 149.510 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Aids to Navigation General § 149.510 How do I get permission to establish an aid to navigation? (a...

  20. 33 CFR 149.510 - How do I get permission to establish an aid to navigation?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false How do I get permission to establish an aid to navigation? 149.510 Section 149.510 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Aids to Navigation General § 149.510 How do I get permission to establish an aid to navigation? (a...

  1. 33 CFR 149.505 - What are the general requirements for aids to navigation?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... for aids to navigation? 149.505 Section 149.505 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Aids to Navigation General § 149.505 What are the general requirements for aids to navigation? The following requirements apply to navigation aids under this subpart: (a) Section 66.01-5 of this chapter,...

  2. 33 CFR 149.505 - What are the general requirements for aids to navigation?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... for aids to navigation? 149.505 Section 149.505 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Aids to Navigation General § 149.505 What are the general requirements for aids to navigation? The following requirements apply to navigation aids under this subpart: (a) Section 66.01-5 of this chapter,...

  3. 33 CFR 149.505 - What are the general requirements for aids to navigation?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... for aids to navigation? 149.505 Section 149.505 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Aids to Navigation General § 149.505 What are the general requirements for aids to navigation? The following requirements apply to navigation aids under this subpart: (a) Section 66.01-5 of this chapter,...

  4. 33 CFR 149.505 - What are the general requirements for aids to navigation?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... for aids to navigation? 149.505 Section 149.505 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Aids to Navigation General § 149.505 What are the general requirements for aids to navigation? The following requirements apply to navigation aids under this subpart: (a) Section 66.01-5 of this chapter,...

  5. 33 CFR 149.505 - What are the general requirements for aids to navigation?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... for aids to navigation? 149.505 Section 149.505 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Aids to Navigation General § 149.505 What are the general requirements for aids to navigation? The following requirements apply to navigation aids under this subpart: (a) Section 66.01-5 of this chapter,...

  6. Development of visual-display aid to air navigation

    NASA Technical Reports Server (NTRS)

    Matcovich, T. J.

    1973-01-01

    The developments are discussed in the design of a liquid-crystal, visual display, air navigation aid, which uses two VOR signals to locate the aircraft. The system concepts, liquid crystal materials, stability tests, and the electronic system are described. It is concluded that a navigational aid of this type is technically feasible, but not at the projected low cost.

  7. Performance Evaluation and Analysis for Gravity Matching Aided Navigation

    PubMed Central

    Wu, Lin; Wang, Hubiao; Chai, Hua; Zhang, Lu; Hsu, Houtse; Wang, Yong

    2017-01-01

    Simulation tests were accomplished in this paper to evaluate the performance of gravity matching aided navigation (GMAN). Four essential factors were focused in this study to quantitatively evaluate the performance: gravity database (DB) resolution, fitting degree of gravity measurements, number of samples in matching, and gravity changes in the matching area. Marine gravity anomaly DB derived from satellite altimetry was employed. Actual dynamic gravimetry accuracy and operating conditions were referenced to design the simulation parameters. The results verified that the improvement of DB resolution, gravimetry accuracy, number of measurement samples, or gravity changes in the matching area generally led to higher positioning accuracies, while the effects of them were different and interrelated. Moreover, three typical positioning accuracy targets of GMAN were proposed, and the conditions to achieve these targets were concluded based on the analysis of several different system requirements. Finally, various approaches were provided to improve the positioning accuracy of GMAN. PMID:28379178

  8. Space shuttle navigation analysis. Volume 1: GPS aided navigation

    NASA Technical Reports Server (NTRS)

    Matchett, G. A.; Vogel, M. A.; Macdonald, T. J.

    1980-01-01

    Analytical studies related to space shuttle navigation are presented. Studies related to the addition of NAVSTAR Global Positioning System user equipment to the shuttle avionics suite are presented. The GPS studies center about navigation accuracy covariance analyses for both developmental and operational phases of GPS, as well as for various orbiter mission phases.

  9. The attribution of success when using navigation aids

    PubMed Central

    Brown, Michael; Houghton, Robert; Sharples, Sarah; Morley, Jeremy

    2015-01-01

    Attitudes towards geographic information technology is a seldom explored research area that can be explained with reference to established theories of attribution. This article reports on a study of how the attribution of success and failure in pedestrian navigation varies with level of automation, degree of success and locus of control. A total of 113 participants took part in a survey exploring reflections on personal experiences and vignettes describing fictional navigation experiences. A complex relationship was discovered in which success tends to be attributed to skill and failure to the navigation aid when participants describe their own experiences. A reversed pattern of results was found when discussing the navigation of others. It was also found that navigation success and failure are associated with personal skill to a greater extent when using paper maps, as compared with web-based routing engines or satellite navigation systems. Practitioner Summary: This article explores the influences on the attribution of success and failure when using navigation aids. A survey was performed exploring interpretations of navigation experiences. Level of success, self or other as navigator and type of navigation aid used are all found to influence the attribution of outcomes to internal or external factors. PMID:25384842

  10. 33 CFR 150.705 - What are the requirements for maintaining and inspecting aids to navigation?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... maintaining and inspecting aids to navigation? 150.705 Section 150.705 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.705 What are the requirements for maintaining and inspecting aids to navigation? (a)...

  11. 33 CFR 150.705 - What are the requirements for maintaining and inspecting aids to navigation?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... maintaining and inspecting aids to navigation? 150.705 Section 150.705 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.705 What are the requirements for maintaining and inspecting aids to navigation? (a)...

  12. 33 CFR 150.715 - What are the requirements for lights used as aids to navigation?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... lights used as aids to navigation? 150.715 Section 150.715 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.715 What are the requirements for lights used as aids to navigation? (a) Each light under part...

  13. 33 CFR 150.705 - What are the requirements for maintaining and inspecting aids to navigation?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... maintaining and inspecting aids to navigation? 150.705 Section 150.705 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.705 What are the requirements for maintaining and inspecting aids to navigation? (a)...

  14. 33 CFR 150.710 - What are the requirements for supplying power to aids to navigation?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... supplying power to aids to navigation? 150.710 Section 150.710 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.710 What are the requirements for supplying power to aids to navigation? The power of...

  15. 33 CFR 150.705 - What are the requirements for maintaining and inspecting aids to navigation?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... maintaining and inspecting aids to navigation? 150.705 Section 150.705 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.705 What are the requirements for maintaining and inspecting aids to navigation? (a)...

  16. 33 CFR 150.705 - What are the requirements for maintaining and inspecting aids to navigation?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... maintaining and inspecting aids to navigation? 150.705 Section 150.705 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.705 What are the requirements for maintaining and inspecting aids to navigation? (a)...

  17. 33 CFR 150.710 - What are the requirements for supplying power to aids to navigation?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... supplying power to aids to navigation? 150.710 Section 150.710 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.710 What are the requirements for supplying power to aids to navigation? The power of...

  18. 33 CFR 150.715 - What are the requirements for lights used as aids to navigation?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... lights used as aids to navigation? 150.715 Section 150.715 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.715 What are the requirements for lights used as aids to navigation? (a) Each light under part...

  19. 33 CFR 150.710 - What are the requirements for supplying power to aids to navigation?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... supplying power to aids to navigation? 150.710 Section 150.710 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.710 What are the requirements for supplying power to aids to navigation? The power of...

  20. 33 CFR 150.710 - What are the requirements for supplying power to aids to navigation?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... supplying power to aids to navigation? 150.710 Section 150.710 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.710 What are the requirements for supplying power to aids to navigation? The power of...

  1. 33 CFR 150.715 - What are the requirements for lights used as aids to navigation?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... lights used as aids to navigation? 150.715 Section 150.715 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.715 What are the requirements for lights used as aids to navigation? (a) Each light under part...

  2. 33 CFR 150.715 - What are the requirements for lights used as aids to navigation?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... lights used as aids to navigation? 150.715 Section 150.715 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.715 What are the requirements for lights used as aids to navigation? (a) Each light under part...

  3. 33 CFR 150.715 - What are the requirements for lights used as aids to navigation?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... lights used as aids to navigation? 150.715 Section 150.715 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.715 What are the requirements for lights used as aids to navigation? (a) Each light under part...

  4. 33 CFR 150.710 - What are the requirements for supplying power to aids to navigation?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... supplying power to aids to navigation? 150.710 Section 150.710 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DEEPWATER PORTS DEEPWATER PORTS: OPERATIONS Aids to Navigation § 150.710 What are the requirements for supplying power to aids to navigation? The power of...

  5. 78 FR 18615 - Navigation Safety Advisory Council

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-27

    ...; routing measures; marine information; diving safety; and aids to navigation systems. The meeting will be...; routing measures; marine information; diving safety; and aids to navigation systems. The meeting will...

  6. 77 FR 67658 - Navigation Safety Advisory Council

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-13

    ... measures, marine information, diving safety, and aids to navigation systems. The meeting will be open to... measures, marine information, diving safety, and aids to navigation systems. Agenda: The NAVSAC will...

  7. Data management of Shuttle radiofrequency navigation aids

    NASA Technical Reports Server (NTRS)

    Stokes, R. E.; Presser, P.

    1982-01-01

    It is noted that the Shuttle navigation system employs redundant tactical air navigation (tacan) and microwave scanning beam landing system (MSBLS) equipment for use in navigation during descent from altitudes of about 150,000 feet through rollout. Attention is given here to the multiple tacan and MSBLS units (three each) that were placed onboard to provide the necessary protection in the event of possible failures. The goals, features, approach, and performance of onboard software required to manage multiple tacan MSBLS units and to provide the corresponding data for navigation processing are described.

  8. 33 CFR 66.01-12 - May I continue to use the private aid to navigation I am currently using?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false May I continue to use the private aid to navigation I am currently using? 66.01-12 Section 66.01-12 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Aids...

  9. 33 CFR 66.01-12 - May I continue to use the private aid to navigation I am currently using?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false May I continue to use the private aid to navigation I am currently using? 66.01-12 Section 66.01-12 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Aids...

  10. 33 CFR 66.01-12 - May I continue to use the private aid to navigation I am currently using?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false May I continue to use the private aid to navigation I am currently using? 66.01-12 Section 66.01-12 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Aids...

  11. 33 CFR 66.01-12 - May I continue to use the private aid to navigation I am currently using?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false May I continue to use the private aid to navigation I am currently using? 66.01-12 Section 66.01-12 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Aids...

  12. 33 CFR 66.01-12 - May I continue to use the private aid to navigation I am currently using?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false May I continue to use the private aid to navigation I am currently using? 66.01-12 Section 66.01-12 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION Aids...

  13. 33 CFR 66.05-10 - State waters for private aids to navigation; designations; revisions, and revocations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false State waters for private aids to... Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-10 State waters for private aids to navigation; designations; revisions,...

  14. 33 CFR 66.05-10 - State waters for private aids to navigation; designations; revisions, and revocations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false State waters for private aids to... Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-10 State waters for private aids to navigation; designations; revisions,...

  15. 33 CFR 66.05-10 - State waters for private aids to navigation; designations; revisions, and revocations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false State waters for private aids to... Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-10 State waters for private aids to navigation; designations; revisions,...

  16. 33 CFR 66.05-10 - State waters for private aids to navigation; designations; revisions, and revocations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false State waters for private aids to... Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-10 State waters for private aids to navigation; designations; revisions,...

  17. 33 CFR 66.05-10 - State waters for private aids to navigation; designations; revisions, and revocations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false State waters for private aids to... Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-10 State waters for private aids to navigation; designations; revisions,...

  18. Viewing Phobos and Deimos for navigating Mariner 9.

    NASA Technical Reports Server (NTRS)

    Duxbury, T. C.; Born, G. H.; Jerath, N.

    1972-01-01

    A new on-board optical navigation data technique has been successfully demonstrated on Mariner 9. Science TV pictures of Phobos and Deimos against star fields were used in the real time navigation process to insert Mariner 9 into orbit about Mars. Real time and post flight evaluation results have shown that the satellite/star data taken by Mariner 9 was more accurate than preflight analysis indicated. In fact the orbital insertion phase of the mission could have been achieved using only optical data to determine encounter parameters. The use of a science TV camera to obtain this data was successfully demonstrated. Stars as dim as 9th magnitude were detected and measurement accuracies of 3 arc sec (1 sigma) were achieved. The success of the optical navigation techniques developed for Mariner 9 has placed a new class of demanding missions (e.g., multiple outer planet, satellite tour, etc) within realized navigation capability.

  19. 33 CFR 62.5 - Marking of marine parades and regattas.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... AIDS TO NAVIGATION UNITED STATES AIDS TO NAVIGATION SYSTEM General § 62.5 Marking of marine parades and regattas. (a) The Coast Guard may establish aids to navigation to mark marine parades and regattas...

  20. 33 CFR 62.5 - Marking of marine parades and regattas.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... AIDS TO NAVIGATION UNITED STATES AIDS TO NAVIGATION SYSTEM General § 62.5 Marking of marine parades and regattas. (a) The Coast Guard may establish aids to navigation to mark marine parades and regattas...

  1. 33 CFR 62.5 - Marking of marine parades and regattas.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... AIDS TO NAVIGATION UNITED STATES AIDS TO NAVIGATION SYSTEM General § 62.5 Marking of marine parades and regattas. (a) The Coast Guard may establish aids to navigation to mark marine parades and regattas...

  2. 33 CFR 62.5 - Marking of marine parades and regattas.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... AIDS TO NAVIGATION UNITED STATES AIDS TO NAVIGATION SYSTEM General § 62.5 Marking of marine parades and regattas. (a) The Coast Guard may establish aids to navigation to mark marine parades and regattas...

  3. 33 CFR 62.5 - Marking of marine parades and regattas.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... AIDS TO NAVIGATION UNITED STATES AIDS TO NAVIGATION SYSTEM General § 62.5 Marking of marine parades and regattas. (a) The Coast Guard may establish aids to navigation to mark marine parades and regattas...

  4. 33 CFR 72.01-25 - Marine broadcast notice to mariners.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Marine broadcast notice to mariners. 72.01-25 Section 72.01-25 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION MARINE INFORMATION Notices to Mariners § 72.01-25 Marine broadcast notice...

  5. A new algorithm of gravity matching aided navigation

    NASA Astrophysics Data System (ADS)

    Yan, Li; Cui, Chenfeng

    2007-11-01

    Up to now, TERCOM hasn't been used in the gravity matching aided navigation, because of its disability in precise positioning. So does ICCP, which needs precise initial values, whereas the initial values provided by INS are not accurate enough. This paper starts from the introduction of the basic principles of TERCOM and ICCP, and compares their advantages and disadvantages, then incorporates these two methods into a new algorithm in which TERCOM provides the initial position and ICCP does the precise positioning. At last simulation data is used in the experiments, with the purpose to shed light on the effect of this new algorithm in gravity matching aided navigation. It is proved that the new method is precise and needs no initial values. It is very fit for gravity matching aided navigation.

  6. Navigation and Alignment Aids Concept of Operations and Supplemental Design Information. Revision A

    NASA Technical Reports Server (NTRS)

    Kelly, Sean M.; Cryan, Scott P.

    2016-01-01

    The IDSS Navigation and Alignment Aids Concept of Operations and Supplemental Design Information document provides supplemental information to the IDSS IDD. The guide provides insight into the navigation and alignment aids design, and how those aids can be utilized by incoming vehicles for proximity operations and docking. The navigation aids are paramount to successful docking.

  7. Crew-Aided Autonomous Navigation Project

    NASA Technical Reports Server (NTRS)

    Holt, Greg

    2015-01-01

    Manual capability to perform star/planet-limb sightings provides a cheap, simple, and robust backup navigation source for exploration missions independent from the ground. Sextant sightings from spacecraft were first exercised in Gemini and flew as the loss-of-communications backup for all Apollo missions. This study seeks to procure and characterize error sources of navigation-grade sextants for feasibility of taking star and planetary limb sightings from inside a spacecraft. A series of similar studies was performed in the early/mid-1960s in preparation for Apollo missions, and one goal of this study is to modernize and update those findings. This technique has the potential to deliver significant risk mitigation, validation, and backup to more complex low-TRL automated systems under development involving cameras.

  8. Visual navigation aid for planetary UAV risk reduction

    NASA Astrophysics Data System (ADS)

    McPherson, C. A.; Bottkol, M. S.; Madison, R. W.; DeBitetto, P. A.; Young, M.

    2007-09-01

    Unlike the navigation problem of Earth operations, the precise navigation of a vehicle in a remote planetary environment presents a challenging problem for either absolute or relative navigation. There exist no GPS/INS solutions due to a lack of a GPS constellation, few or no accurately surveyed markers for use in terminal sensing measurements, and highly uncertain terrain elevation maps used by a TERCOM system. These, and other, issues prompted the investigation of the potential use of a visual navigation aid to supplement an Inertial Navigation System (INS) and radar altimeter suite of a planetary airplane for the purpose of the identifying the potential benefit of visual measurements to the overall navigation solution. The mission objective used in the study, described herein, requires the precise relative navigation of the airplane over an uncertain terrain. Unlike the previously successful employment of visual aided navigation on the MER1 landing vehicle, the mission objectives require that the airplane traverse a precise flight pattern over the objective terrain at relatively low altitudes for hundreds of kilometers, and is more akin to a velocity correlator application than a terminal fix problem. The results of the investigation indicate that a good knowledge of aircraft altitude is required in order to obtain the desired performance for velocity estimate accuracy. However, it was determined that the direction of the velocity vector can be obtained without a high accuracy height estimate. The characterization of the dependency of velocity estimate accuracy upon the variety of factors involved in the process is the primary focus of this report. This report describes the approach taken in this investigation to both define the architecture of the solution for minimal impact upon payload requirements, and the analysis of the potential gains to the overall navigation problem. Also described as part of the problem definition are the initially assumed contribution

  9. IPS - a vision aided navigation system

    NASA Astrophysics Data System (ADS)

    Börner, Anko; Baumbach, Dirk; Buder, Maximilian; Choinowski, Andre; Ernst, Ines; Funk, Eugen; Grießbach, Denis; Schischmanow, Adrian; Wohlfeil, Jürgen; Zuev, Sergey

    2017-04-01

    Ego localization is an important prerequisite for several scientific, commercial, and statutory tasks. Only by knowing one's own position, can guidance be provided, inspections be executed, and autonomous vehicles be operated. Localization becomes challenging if satellite-based navigation systems are not available, or data quality is not sufficient. To overcome this problem, a team of the German Aerospace Center (DLR) developed a multi-sensor system based on the human head and its navigation sensors - the eyes and the vestibular system. This system is called integrated positioning system (IPS) and contains a stereo camera and an inertial measurement unit for determining an ego pose in six degrees of freedom in a local coordinate system. IPS is able to operate in real time and can be applied for indoor and outdoor scenarios without any external reference or prior knowledge. In this paper, the system and its key hardware and software components are introduced. The main issues during the development of such complex multi-sensor measurement systems are identified and discussed, and the performance of this technology is demonstrated. The developer team started from scratch and transfers this technology into a commercial product right now. The paper finishes with an outlook.

  10. Navigating the Complex World of Financial Aid

    ERIC Educational Resources Information Center

    Baum, Sandy

    2010-01-01

    The financial-aid policies and practices of colleges and universities have made too many headlines in recent times to remain the domain of technical experts. Boards of trustees, like other constituencies that are responsible for the health and well-being of postsecondary institutions, should be asking how issues being raised about student…

  11. Optic flow aided navigation and 3D scene reconstruction

    NASA Astrophysics Data System (ADS)

    Rollason, Malcolm

    2013-10-01

    An important enabler for low cost airborne systems is the ability to exploit low cost inertial instruments. An Inertial Navigation System (INS) can provide a navigation solution, when GPS is denied, by integrating measurements from inertial sensors. However, the gyrometer and accelerometer biases of low cost inertial sensors cause compound errors in the integrated navigation solution. This paper describes experiments to establish whether (and to what extent) the navigation solution can be aided by fusing measurements from an on-board video camera with measurements from the inertial sensors. The primary aim of the work was to establish whether optic flow aided navigation is beneficial even when the 3D structure within the observed scene is unknown. A further aim was to investigate whether an INS can help to infer 3D scene content from video. Experiments with both real and synthetic data have been conducted. Real data was collected using an AR Parrot quadrotor. Empirical results illustrate that optic flow provides a useful aid to navigation even when the 3D structure of the observed scene is not known. With optic flow aiding of the INS, the computed trajectory is consistent with the true camera motion, whereas the unaided INS yields a rapidly increasing position error (the data represents ~40 seconds, after which the unaided INS is ~50 metres in error and has passed through the ground). The results of the Monte Carlo simulation concur with the empirical result. Position errors, which grow as a quadratic function of time when unaided, are substantially checked by the availability of optic flow measurements.

  12. A research on SLAM aided INS/GPS navigation system

    NASA Astrophysics Data System (ADS)

    Cao, Menglong; Cui, Pingyuan

    2007-11-01

    Simultaneous Localization and Mapping (SLAM) aided INS/GPS navigation system is a landmark based terrain aided autonomous integrated system that has the capability for online map building and simultaneously utilizing the generated map to bind the errors in the Inertial Navigation System (INS) when GPS is not available. If GPS information is available, the SLAM integrated system builds a landmark-based map using an INS/GPS solution. If GPS is not available, the previously newly generated map is used to constrain the INS errors. The SLAM augmented INS/GPS system shows two capabilities of landmark tracking and mapping using GPS information and more importantly, aiding the INS under GPS denied situation. The validity of the proposed method is demonstrated by computer simulation.

  13. 46 CFR 4.05-20 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 1 2013-10-01 2013-10-01 false Report of accident to aid to navigation. 4.05-20 Section 4.05-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC... accident to aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the...

  14. 46 CFR 4.05-20 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Report of accident to aid to navigation. 4.05-20 Section 4.05-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC... accident to aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the...

  15. 46 CFR 185.230 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Report of accident to aid to navigation. 185.230 Section 185.230 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS... aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the...

  16. 46 CFR 185.230 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Report of accident to aid to navigation. 185.230 Section 185.230 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS... aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the...

  17. 46 CFR 4.05-20 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 1 2011-10-01 2011-10-01 false Report of accident to aid to navigation. 4.05-20 Section 4.05-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC... accident to aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the...

  18. 46 CFR 185.230 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Report of accident to aid to navigation. 185.230 Section 185.230 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS... aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the...

  19. 46 CFR 185.230 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Report of accident to aid to navigation. 185.230 Section 185.230 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS... aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the...

  20. 46 CFR 185.230 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Report of accident to aid to navigation. 185.230 Section 185.230 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS... aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the...

  1. 46 CFR 4.05-20 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 1 2012-10-01 2012-10-01 false Report of accident to aid to navigation. 4.05-20 Section 4.05-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC... accident to aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the...

  2. 46 CFR 4.05-20 - Report of accident to aid to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 1 2014-10-01 2014-10-01 false Report of accident to aid to navigation. 4.05-20 Section 4.05-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC... accident to aid to navigation. Whenever a vessel collides with a buoy, or other aid to navigation under the...

  3. 77 FR 19302 - Navigation Safety Advisory Council

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-30

    ... measures, marine information, diving safety, and aids to navigation systems. The meeting will be open to..., routing measures, marine information, diving safety, and aids to navigation systems. Agenda The NAVSAC... the future mix of visual and electronic Aids to Navigation (ATON). (6) Automatic Identification...

  4. Gravity gradiometer aided inertial navigation within non-GNSS environments

    NASA Astrophysics Data System (ADS)

    Richeson, Justin A.

    Gravity gradiometer aiding of a strapdown inertial navigation system (INS) in the event of Global Navigation Satellite System (GNSS) signal loss, or as a complement to an INS/GNSS system, is proposed. Gravity gradiometry is ideal for covert military applications where a self contained, passive, spoof-free aid is desirable, and for space navigation near planetary bodies and moons where GNSS is unavailable. This dissertation provides the first comprehensive discussion on gravity gradiometry fundamentals, map modeling, and regional and altitude effects on the gravitational gradient signal for use as a navigation aid. A thorough methodology to implement strapdown and stabilized gravity gradiometer instruments (GGIs) into an autonomous extended Kalman filter is also presented in the open literature for the first time. Lastly, a brief discussion on extraterrestrial navigation using gravity gradiometry is given. To quantify the potential performance for future gravity gradiometer instruments as an INS aid, extensive Monte Carlo simulations of a hypersonic scramjet cruise missile were performed. The results for the 1000 km range mission indicate that GGI updates significantly improve the navigation accuracy of the autonomous INS. The sensitivities of the system to variations in inertial measurement unit (IMU) quality, gravity field variation, GGI noise, update rate, and type are also investigated along with a baseline INS/Global Positioning System (GPS). Given emerging technologies that have the potential to drastically decrease gradiometer noise levels, a hypothetical future grade gravity gradiometer aided INS is shown to bound root-mean-square (RMS) position errors at 0.336 m, velocity errors at 0.0069 m/s, and attitude errors at 0.00977°, which is comparable to the nominal INS/GPS system with 10 sec updates. The performance of two subsonic cases is also investigated and produced impressive passive navigation accuracy. A commercial aircraft simulation using a future

  5. Navigating the AIDS industry: being poor and positive in Tanzania.

    PubMed

    Boesten, Jelke

    2011-01-01

    This article shows how poor people living with HIV/AIDS in Tanzania navigate a myriad of actors, agencies and organizations to obtain the aid they need to survive. It focuses on community-based organizations which establish networks of care through which people obtain care, treatment and financial support. A case study of a roadside town in Tanzania illustrates that these community-based networks of care — essential to the survival of many — are partly the product of the AIDS industry, which encourages the establishment of community-based organizations and voluntary service delivery rather than more formalized systems of care. Community-based organizations, however, are so poorly supported that they often deploy self-destructive strategies. The need to strategically navigate the AIDS industry creates tension and even conflict among HIV-positive activists, the people they represent and the wider community, which undermines rather than strengthens community-based interventions. Whilst the AIDS industry promises inclusion of HIV-positive people in the response to HIV/AIDS, it succeeds only partially, with the result that it may potentially do more harm than good.

  6. 33 CFR 72.01-25 - Marine broadcast notice to mariners.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Marine broadcast notice to... SECURITY AIDS TO NAVIGATION MARINE INFORMATION Notices to Mariners § 72.01-25 Marine broadcast notice to... mines. Radio stations broadcasting marine information are listed in “Radio Navigational Aids”...

  7. 33 CFR 72.01-25 - Marine broadcast notice to mariners.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Marine broadcast notice to... SECURITY AIDS TO NAVIGATION MARINE INFORMATION Notices to Mariners § 72.01-25 Marine broadcast notice to... mines. Radio stations broadcasting marine information are listed in “Radio Navigational Aids”...

  8. 33 CFR 72.01-25 - Marine broadcast notice to mariners.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Marine broadcast notice to... SECURITY AIDS TO NAVIGATION MARINE INFORMATION Notices to Mariners § 72.01-25 Marine broadcast notice to... mines. Radio stations broadcasting marine information are listed in “Radio Navigational Aids”...

  9. 78 FR 68077 - Navigation Safety Advisory Council

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-13

    ... equipment; routing measures; marine information; diving safety; and aids to navigation systems. The meeting...; and aids to navigation systems. The meeting will be held at the Renaissance Portsmouth Hotel...

  10. Development of performance measures based on visibility for effective placement of aids to navigation

    NASA Astrophysics Data System (ADS)

    Fang, Tae Hyun; Kim, Yeon-Gyu; Gong, In-Young; Park, Sekil; Kim, Ah-Young

    2015-05-01

    In order to develop the challenging process of placing Aids to Navigation (AtoN), we propose performance measures which quantifies the effect of such placement. The best placement of AtoNs is that from which the navigator can best recognize the information provided by an AtoN. The visibility of AtoNs depends mostly on light sources, the weather condition and the position of the navigator. Visual recognition is enabled by achieving adequate contrast between the AtoN light source and background light. Therefore, the performance measures can be formulated through the amount of differences between these two lights. For simplification, this approach is based on the values of the human factor suggested by International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA). Performance measures for AtoN placement can be evaluated through AtoN Simulator, which has been being developed by KIOST/KRISO in Korea and has been launched by Korea National Research Program. Simulations for evaluation are carried out at waterway in Busan port in Korea.

  11. Development of performance measures based on visibility for effective placement of aids to navigation

    NASA Astrophysics Data System (ADS)

    Fang, Tae Hyun; Kim, Yeon-Gyu; Gong, In-Young; Park, Sekil; Kim, Ah-Young

    2015-09-01

    In order to develop the challenging process of placing Aids to Navigation (AtoN), we propose performance measures which quantifies the effect of such placement. The best placement of AtoNs is that from which the navigator can best recognize the information provided by an AtoN. The visibility of AtoNs depends mostly on light sources, the weather condition and the position of the navigator. Visual recognition is enabled by achieving adequate contrast between the AtoN light source and background light. Therefore, the performance measures can be formulated through the amount of differences between these two lights. For simplification, this approach is based on the values of the human factor suggested by International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA). Performance measures for AtoN placement can be evaluated through AtoN Simulator, which has been being developed by KIOST/KRISO in Korea and has been launched by Korea National Research Program. Simulations for evaluation are carried out at waterway in Busan port in Korea.

  12. Soft tissue navigation using needle-shaped markers: Evaluation of navigation aid tracking accuracy and CT registration

    NASA Astrophysics Data System (ADS)

    Maier-Hein, L.; Maleike, D.; Neuhaus, J.; Franz, A.; Wolf, I.; Meinzer, H.-P.

    2007-03-01

    We evaluate two core modules of a novel soft tissue navigation system. The system estimates the position of a hidden target (e.g. a tumor) during a minimally invasive intervention from the location of a set of optically tracked needle-shaped navigation aids which are placed in the vicinity of the target. The initial position of the target relative to the navigation aids is obtained from a CT scan. The accuracy of the entire system depends on (a) the accuracy for locating a set of navigation aids in a CT image, (b) the accuracy for determining the positions of the navigation aids during the intervention by means of optical tracking, (c) the accuracy for tracking the applicator (e.g. the biopsy needle), and (d) the accuracy of the real-time deformation model which continuously computes the location of the initially determined target point from the current positions of the navigation aids. In this paper, we focus on the first two aspects. We introduce the navigation aids we constructed for our system and show that the needle tips can be tracked with submillimeter accuracy. Furthermore, we present and evaluate three methods for registering a set of navigation aid models with a given CT image. The fully-automatic algorithm outperforms both the manual method and the semi-automatic algorithm, yielding an average distance of 0.27 +/- 0.08 mm between the estimated needle tip position and the reference position.

  13. 33 CFR 70.05-10 - Revocation of merchant mariner credential officer endorsement or license.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION INTERFERENCE WITH OR DAMAGE TO AIDS TO NAVIGATION Collision With or Damage to Aids to Navigation § 70.05-10 Revocation of merchant mariner...

  14. 33 CFR 70.05-10 - Revocation of merchant mariner credential officer endorsement or license.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION INTERFERENCE WITH OR DAMAGE TO AIDS TO NAVIGATION Collision With or Damage to Aids to Navigation § 70.05-10 Revocation of merchant mariner...

  15. 33 CFR 70.05-10 - Revocation of merchant mariner credential officer endorsement or license.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION INTERFERENCE WITH OR DAMAGE TO AIDS TO NAVIGATION Collision With or Damage to Aids to Navigation § 70.05-10 Revocation of merchant mariner...

  16. 33 CFR 70.05-10 - Revocation of merchant mariner credential officer endorsement or license.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION INTERFERENCE WITH OR DAMAGE TO AIDS TO NAVIGATION Collision With or Damage to Aids to Navigation § 70.05-10 Revocation of merchant mariner...

  17. Vision aided inertial navigation system augmented with a coded aperture

    NASA Astrophysics Data System (ADS)

    Morrison, Jamie R.

    plate aperture produces diffraction patterns that change the shape of the focal blur pattern. When used as an aperture, the Fresnel zone plate produces multiple focal planes in the scene. The interference between the multiple focal planes produce changes in the aperture that can be observed both between the focal planes and beyond the most distant focal plane. The Fresnel zone plate aperture and lens may be designed to change in the focal blur pattern at greater depths, thereby improving measurement performance of the coded aperture system. This research provides an in-depth study of the Fresnel zone plate used as a coded aperture, and the performance improvement obtained by augmenting a single camera vision aided inertial navigation system with a Fresnel zone plate coded aperture. Design and analysis of a generalized coded aperture is presented and demonstrated, and special considerations for the Fresnel zone plate are given. Also techniques to determine a continuous depth measurement from a coded image are presented and evaluated through measurement. Finally the measurement results from different aperture configurations are statistically modeled and compared with a simulated vision aided navigation environment to predict the change in performance of a vision aided inertial navigation system when augmented with a coded aperture.

  18. Feasibility of Using Synthetic Aperture Radar to Aid UAV Navigation

    PubMed Central

    Nitti, Davide O.; Bovenga, Fabio; Chiaradia, Maria T.; Greco, Mario; Pinelli, Gianpaolo

    2015-01-01

    This study explores the potential of Synthetic Aperture Radar (SAR) to aid Unmanned Aerial Vehicle (UAV) navigation when Inertial Navigation System (INS) measurements are not accurate enough to eliminate drifts from a planned trajectory. This problem can affect medium-altitude long-endurance (MALE) UAV class, which permits heavy and wide payloads (as required by SAR) and flights for thousands of kilometres accumulating large drifts. The basic idea is to infer position and attitude of an aerial platform by inspecting both amplitude and phase of SAR images acquired onboard. For the amplitude-based approach, the system navigation corrections are obtained by matching the actual coordinates of ground landmarks with those automatically extracted from the SAR image. When the use of SAR amplitude is unfeasible, the phase content can be exploited through SAR interferometry by using a reference Digital Terrain Model (DTM). A feasibility analysis was carried out to derive system requirements by exploring both radiometric and geometric parameters of the acquisition setting. We showed that MALE UAV, specific commercial navigation sensors and SAR systems, typical landmark position accuracy and classes, and available DTMs lead to estimate UAV coordinates with errors bounded within ±12 m, thus making feasible the proposed SAR-based backup system. PMID:26225977

  19. Feasibility of Using Synthetic Aperture Radar to Aid UAV Navigation.

    PubMed

    Nitti, Davide O; Bovenga, Fabio; Chiaradia, Maria T; Greco, Mario; Pinelli, Gianpaolo

    2015-07-28

    This study explores the potential of Synthetic Aperture Radar (SAR) to aid Unmanned Aerial Vehicle (UAV) navigation when Inertial Navigation System (INS) measurements are not accurate enough to eliminate drifts from a planned trajectory. This problem can affect medium-altitude long-endurance (MALE) UAV class, which permits heavy and wide payloads (as required by SAR) and flights for thousands of kilometres accumulating large drifts. The basic idea is to infer position and attitude of an aerial platform by inspecting both amplitude and phase of SAR images acquired onboard. For the amplitude-based approach, the system navigation corrections are obtained by matching the actual coordinates of ground landmarks with those automatically extracted from the SAR image. When the use of SAR amplitude is unfeasible, the phase content can be exploited through SAR interferometry by using a reference Digital Terrain Model (DTM). A feasibility analysis was carried out to derive system requirements by exploring both radiometric and geometric parameters of the acquisition setting. We showed that MALE UAV, specific commercial navigation sensors and SAR systems, typical landmark position accuracy and classes, and available DTMs lead to estimated UAV coordinates with errors bounded within ±12 m, thus making feasible the proposed SAR-based backup system.

  20. 33 CFR 72.01-10 - Notice to Mariners.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... NAVIGATION MARINE INFORMATION Notices to Mariners § 72.01-10 Notice to Mariners. (a) “Notice to Mariners” is intended to advise mariners of new hydrographic discoveries, changes in channels and navigational aids, and... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Notice to Mariners....

  1. 33 CFR 66.05-30 - Notice to Mariners.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Section 66.05-30 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-30 Notice to Mariners. (a) To improve public safety, the District Commander may publish information concerning State aids to...

  2. 33 CFR 66.05-30 - Notice to Mariners.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Section 66.05-30 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-30 Notice to Mariners. (a) To improve public safety, the District Commander may publish information concerning State aids to...

  3. 33 CFR 66.05-30 - Notice to Mariners.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Section 66.05-30 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-30 Notice to Mariners. (a) To improve public safety, the District Commander may publish information concerning State aids to...

  4. 33 CFR 66.05-30 - Notice to Mariners.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Section 66.05-30 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-30 Notice to Mariners. (a) To improve public safety, the District Commander may publish information concerning State aids to...

  5. 33 CFR 66.05-30 - Notice to Mariners.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Section 66.05-30 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION PRIVATE AIDS TO NAVIGATION State Aids to Navigation § 66.05-30 Notice to Mariners. (a) To improve public safety, the District Commander may publish information concerning State aids to...

  6. 14 CFR 151.95 - Fences; distance markers; navigational and landing aids; and offsite work.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... landing aids; and offsite work. 151.95 Section 151.95 Aeronautics and Space FEDERAL AVIATION... Standards § 151.95 Fences; distance markers; navigational and landing aids; and offsite work. (a) Boundary... navigational aids is eligible for inclusion in a proj- ect whenever necessitated by development on the...

  7. 14 CFR 151.95 - Fences; distance markers; navigational and landing aids; and offsite work.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... landing aids; and offsite work. 151.95 Section 151.95 Aeronautics and Space FEDERAL AVIATION... Standards § 151.95 Fences; distance markers; navigational and landing aids; and offsite work. (a) Boundary... navigational aids is eligible for inclusion in a proj- ect whenever necessitated by development on the...

  8. 14 CFR 151.95 - Fences; distance markers; navigational and landing aids; and offsite work.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... landing aids; and offsite work. 151.95 Section 151.95 Aeronautics and Space FEDERAL AVIATION... Standards § 151.95 Fences; distance markers; navigational and landing aids; and offsite work. (a) Boundary... navigational aids is eligible for inclusion in a proj- ect whenever necessitated by development on the...

  9. 14 CFR 151.95 - Fences; distance markers; navigational and landing aids; and offsite work.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... landing aids; and offsite work. 151.95 Section 151.95 Aeronautics and Space FEDERAL AVIATION... Standards § 151.95 Fences; distance markers; navigational and landing aids; and offsite work. (a) Boundary... navigational aids is eligible for inclusion in a proj- ect whenever necessitated by development on the...

  10. 14 CFR 151.95 - Fences; distance markers; navigational and landing aids; and offsite work.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... landing aids; and offsite work. 151.95 Section 151.95 Aeronautics and Space FEDERAL AVIATION... Standards § 151.95 Fences; distance markers; navigational and landing aids; and offsite work. (a) Boundary... navigational aids is eligible for inclusion in a proj- ect whenever necessitated by development on the...

  11. An Effective Terrain Aided Navigation for Low-Cost Autonomous Underwater Vehicles.

    PubMed

    Zhou, Ling; Cheng, Xianghong; Zhu, Yixian; Dai, Chenxi; Fu, Jinbo

    2017-03-25

    Terrain-aided navigation is a potentially powerful solution for obtaining submerged position fixes for autonomous underwater vehicles. The application of terrain-aided navigation with high-accuracy inertial navigation systems has demonstrated meter-level navigation accuracy in sea trials. However, available sensors may be limited depending on the type of the mission. Such limitations, especially for low-grade navigation sensors, not only degrade the accuracy of traditional navigation systems, but further impact the ability to successfully employ terrain-aided navigation. To address this problem, a tightly-coupled navigation is presented to successfully estimate the critical sensor errors by incorporating raw sensor data directly into an augmented navigation system. Furthermore, three-dimensional distance errors are calculated, providing measurement updates through the particle filter for absolute and bounded position error. The development of the terrain aided navigation system is elaborated for a vehicle equipped with a non-inertial-grade strapdown inertial navigation system, a 4-beam Doppler Velocity Log range sensor and a sonar altimeter. Using experimental data for navigation performance evaluation in areas with different terrain characteristics, the experiment results further show that the proposed method can be successfully applied to the low-cost AUVs and significantly improves navigation performance.

  12. An Effective Terrain Aided Navigation for Low-Cost Autonomous Underwater Vehicles

    PubMed Central

    Zhou, Ling; Cheng, Xianghong; Zhu, Yixian; Dai, Chenxi; Fu, Jinbo

    2017-01-01

    Terrain-aided navigation is a potentially powerful solution for obtaining submerged position fixes for autonomous underwater vehicles. The application of terrain-aided navigation with high-accuracy inertial navigation systems has demonstrated meter-level navigation accuracy in sea trials. However, available sensors may be limited depending on the type of the mission. Such limitations, especially for low-grade navigation sensors, not only degrade the accuracy of traditional navigation systems, but further impact the ability to successfully employ terrain-aided navigation. To address this problem, a tightly-coupled navigation is presented to successfully estimate the critical sensor errors by incorporating raw sensor data directly into an augmented navigation system. Furthermore, three-dimensional distance errors are calculated, providing measurement updates through the particle filter for absolute and bounded position error. The development of the terrain aided navigation system is elaborated for a vehicle equipped with a non-inertial-grade strapdown inertial navigation system, a 4-beam Doppler Velocity Log range sensor and a sonar altimeter. Using experimental data for navigation performance evaluation in areas with different terrain characteristics, the experiment results further show that the proposed method can be successfully applied to the low-cost AUVs and significantly improves navigation performance. PMID:28346346

  13. Knowledge and attitudes of mariners about AIDS in Turkey.

    PubMed

    Acaroglu, Rengin

    2007-01-01

    Given the significant high risks of both being exposed to the virus and spreading it, mariners traveling across countries on a regular basis fall into one of the top-priority populations of those to whom education on HIV/AIDS should be given. However, there have been no reports regarding HIV/AIDS knowledge and attitudes on the part of mariners in Turkey. Therefore, this study was carried out with the aim of defining the knowledge and attitudes of 660 Turkish mariners. Data were determined using a self-completed questionnaire. Percentage and mean scores were used in data analysis. Results show that the mariners' knowledge was inadequate (mean score was 52.31 +/- 20.46 over a total of 100 points). The lowest knowledge pertained to HIV/AIDS prevention (mean score was 44.62 +/- 19.97). About half of the mariners considered themselves to be in the risk group. Very few of them (10%) have had an AIDS test. Most (68%) were informed about HIV/AIDS by the media. These results show that the mariners need to increase HIV/AIDS knowledge about prevention, transmission, treatment information, motivation, and behavioral skills to decrease HIV/AIDS risky behaviors. The mariners had the least knowledge about HIV/AIDS protection. Having a critical role in preventing the transmission and spreading of diseases, nurses should conduct more extensive and advanced research into HIV/AIDS and assume educational and counseling responsibilities in illuminating society.

  14. 76 FR 63934 - Navigation Safety Advisory Council

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-14

    ... measures, marine information, diving safety, and aids to navigation systems. The meeting will be open to... information, diving safety, and aids to navigation systems. Agenda The NAVSAC will meet to review, discuss and... provide an opinion on the continued used of radar beacons (RACONS) as aids to navigation. (4) NAVSAC...

  15. Determining the Navigational Aids Use on the Internet: The Information Technologies Teacher Candidates' Case

    ERIC Educational Resources Information Center

    Kuzu, Abdullah; Firat, Mehmet

    2010-01-01

    The Internet users who fail to cope with navigation may generally face various problems such as disorientation, distraction, low motivation and abandonment of information retrieval. Therefore, navigational aids are frequently used in today's Web browsers and Web sites to help users navigate on the Internet. However, it is asserted that…

  16. 75 FR 998 - Terminate Long Range Aids to Navigation (Loran-C) Signal

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-07

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF HOMELAND SECURITY Coast Guard Terminate Long Range Aids to Navigation (Loran-C) Signal AGENCY: U.S. Coast Guard, DHS..., the Department of Transportation has determined that sufficient alternative navigation aids...

  17. Gravity gradient-terrain aided navigation based on particle filter

    NASA Astrophysics Data System (ADS)

    Xiong, Ling; Ma, Jie; Tian, Jin-Wen

    2009-10-01

    Based on Particle Filter, Gravity Gradient-Terrain aided position technology is proposed in this paper. With the sensitivity of gravity gradient to terrain, the gravity gradient reference map can be computed from the local terrain elevation data. The position can be actualized through matching the real-time measured gravity gradient data to the prepared gravity gradient reference map. The most widely used approximate filtering method is the extended Kaman filter (EKF). EKF is computationally simple but, the convergence of the state estimation for the position is not guaranteed. Particle filter (PF) makes use of the non-linear state and measurement functions, no linearization technology is needed. PF can assure the convergence of the state estimation which follows from the classical results on convergence of Bayesian estimators. Simulations have been done and Particle filter has been shown to be a superior alternative to the EKF in the gravity gradient-terrain matching navigation systems.

  18. Context-aided sensor fusion for enhanced urban navigation.

    PubMed

    Martí, Enrique David; Martín, David; García, Jesús; de la Escalera, Arturo; Molina, José Manuel; Armingol, José María

    2012-12-06

     The deployment of Intelligent Vehicles in urban environments requires reliable estimation of positioning for urban navigation. The inherent complexity of this kind of environments fosters the development of novel systems which should provide reliable and precise solutions to the vehicle. This article details an advanced GNSS/IMU fusion system based on a context-aided Unscented Kalman filter for navigation in urban conditions. The constrained non-linear filter is here conditioned by a contextual knowledge module which reasons about sensor quality and driving context in order to adapt it to the situation, while at the same time it carries out a continuous estimation and correction of INS drift errors. An exhaustive analysis has been carried out with available data in order to characterize the behavior of available sensors and take it into account in the developed solution. The performance is then analyzed with an extensive dataset containing representative situations. The proposed solution suits the use of fusion algorithms for deploying Intelligent Transport Systems in urban environments.

  19. Context-Aided Sensor Fusion for Enhanced Urban Navigation

    PubMed Central

    Martí, Enrique David; Martín, David; García, Jesús; de la Escalera, Arturo; Molina, José Manuel; Armingol, José María

    2012-01-01

    The deployment of Intelligent Vehicles in urban environments requires reliable estimation of positioning for urban navigation. The inherent complexity of this kind of environments fosters the development of novel systems which should provide reliable and precise solutions to the vehicle. This article details an advanced GNSS/IMU fusion system based on a context-aided Unscented Kalman filter for navigation in urban conditions. The constrained non-linear filter is here conditioned by a contextual knowledge module which reasons about sensor quality and driving context in order to adapt it to the situation, while at the same time it carries out a continuous estimation and correction of INS drift errors. An exhaustive analysis has been carried out with available data in order to characterize the behavior of available sensors and take it into account in the developed solution. The performance is then analyzed with an extensive dataset containing representative situations. The proposed solution suits the use of fusion algorithms for deploying Intelligent Transport Systems in urban environments. PMID:23223080

  20. 33 CFR 72.01-5 - Local Notice to Mariners.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... NAVIGATION MARINE INFORMATION Notices to Mariners § 72.01-5 Local Notice to Mariners. (a) “Local Notice to Mariners” reports changes to and deficiencies in aids to navigation that are established or maintained and... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Local Notice to Mariners....

  1. Intelligent Behavioral Action Aiding for Improved Autonomous Image Navigation

    DTIC Science & Technology

    2012-09-13

    29 GNSS (Global Navigation Satellite Systems) ..................................................................... 1 IMU (Inertial...Navigation Satellite Systems ( GNSS ) [3][4]. In situations where GNSS is not available (e.g. indoors, jamming etc), alternate navigation system such as...had been extensively studied in the computer vision community [3]. However, image navigation is susceptible to large errors or loss of functionality

  2. 47 CFR 87.395 - Plan for the Security Control of Air Traffic and Air Navigation Aids (Short Title: SCATANA).

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... and Air Navigation Aids (Short Title: SCATANA). 87.395 Section 87.395 Telecommunication FEDERAL... Communications § 87.395 Plan for the Security Control of Air Traffic and Air Navigation Aids (Short Title: SCATANA). (a) The Plan for the Security Control of Air Traffic and Air Navigation Aids (SCATANA)...

  3. 47 CFR 87.395 - Plan for the Security Control of Air Traffic and Air Navigation Aids (Short Title: SCATANA).

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... and Air Navigation Aids (Short Title: SCATANA). 87.395 Section 87.395 Telecommunication FEDERAL... Communications § 87.395 Plan for the Security Control of Air Traffic and Air Navigation Aids (Short Title: SCATANA). (a) The Plan for the Security Control of Air Traffic and Air Navigation Aids (SCATANA)...

  4. 47 CFR 87.395 - Plan for the Security Control of Air Traffic and Air Navigation Aids (Short Title: SCATANA).

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... and Air Navigation Aids (Short Title: SCATANA). 87.395 Section 87.395 Telecommunication FEDERAL... Communications § 87.395 Plan for the Security Control of Air Traffic and Air Navigation Aids (Short Title: SCATANA). (a) The Plan for the Security Control of Air Traffic and Air Navigation Aids (SCATANA)...

  5. 47 CFR 87.395 - Plan for the Security Control of Air Traffic and Air Navigation Aids (Short Title: SCATANA).

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... and Air Navigation Aids (Short Title: SCATANA). 87.395 Section 87.395 Telecommunication FEDERAL... Communications § 87.395 Plan for the Security Control of Air Traffic and Air Navigation Aids (Short Title: SCATANA). (a) The Plan for the Security Control of Air Traffic and Air Navigation Aids (SCATANA)...

  6. 47 CFR 87.395 - Plan for the Security Control of Air Traffic and Air Navigation Aids (Short Title: SCATANA).

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... and Air Navigation Aids (Short Title: SCATANA). 87.395 Section 87.395 Telecommunication FEDERAL... Communications § 87.395 Plan for the Security Control of Air Traffic and Air Navigation Aids (Short Title: SCATANA). (a) The Plan for the Security Control of Air Traffic and Air Navigation Aids (SCATANA)...

  7. Navigating transformations in governance of Chilean marine coastal resources.

    PubMed

    Gelcich, Stefan; Hughes, Terry P; Olsson, Per; Folke, Carl; Defeo, Omar; Fernández, Miriam; Foale, Simon; Gunderson, Lance H; Rodríguez-Sickert, Carlos; Scheffer, Marten; Steneck, Robert S; Castilla, Juan C

    2010-09-28

    Marine ecosystems are in decline. New transformational changes in governance are urgently required to cope with overfishing, pollution, global changes, and other drivers of degradation. Here we explore social, political, and ecological aspects of a transformation in governance of Chile's coastal marine resources, from 1980 to today. Critical elements in the initial preparatory phase of the transformation were (i) recognition of the depletion of resource stocks, (ii) scientific knowledge on the ecology and resilience of targeted species and their role in ecosystem dynamics, and (iii) demonstration-scale experimental trials, building on smaller-scale scientific experiments, which identified new management pathways. The trials improved cooperation among scientists and fishers, integrating knowledge and establishing trust. Political turbulence and resource stock collapse provided a window of opportunity that triggered the transformation, supported by new enabling legislation. Essential elements to navigate this transformation were the ability to network knowledge from the local level to influence the decision-making processes at the national level, and a preexisting social network of fishers that provided political leverage through a national confederation of artisanal fishing collectives. The resultant governance scheme includes a revolutionary national system of marine tenure that allocates user rights and responsibilities to fisher collectives. Although fine tuning is necessary to build resilience of this new regime, this transformation has improved the sustainability of the interconnected social-ecological system. Our analysis of how this transformation unfolded provides insights into how the Chilean system could be further developed and identifies generalized pathways for improved governance of marine resources around the world.

  8. Navigating transformations in governance of Chilean marine coastal resources

    PubMed Central

    Gelcich, Stefan; Hughes, Terry P.; Olsson, Per; Folke, Carl; Defeo, Omar; Fernández, Miriam; Foale, Simon; Gunderson, Lance H.; Rodríguez-Sickert, Carlos; Scheffer, Marten; Steneck, Robert S.; Castilla, Juan C.

    2010-01-01

    Marine ecosystems are in decline. New transformational changes in governance are urgently required to cope with overfishing, pollution, global changes, and other drivers of degradation. Here we explore social, political, and ecological aspects of a transformation in governance of Chile's coastal marine resources, from 1980 to today. Critical elements in the initial preparatory phase of the transformation were (i) recognition of the depletion of resource stocks, (ii) scientific knowledge on the ecology and resilience of targeted species and their role in ecosystem dynamics, and (iii) demonstration-scale experimental trials, building on smaller-scale scientific experiments, which identified new management pathways. The trials improved cooperation among scientists and fishers, integrating knowledge and establishing trust. Political turbulence and resource stock collapse provided a window of opportunity that triggered the transformation, supported by new enabling legislation. Essential elements to navigate this transformation were the ability to network knowledge from the local level to influence the decision-making processes at the national level, and a preexisting social network of fishers that provided political leverage through a national confederation of artisanal fishing collectives. The resultant governance scheme includes a revolutionary national system of marine tenure that allocates user rights and responsibilities to fisher collectives. Although fine tuning is necessary to build resilience of this new regime, this transformation has improved the sustainability of the interconnected social–ecological system. Our analysis of how this transformation unfolded provides insights into how the Chilean system could be further developed and identifies generalized pathways for improved governance of marine resources around the world. PMID:20837530

  9. Terrain aided navigation for autonomous underwater vehicles with coarse maps

    NASA Astrophysics Data System (ADS)

    Zhou, Ling; Cheng, Xianghong; Zhu, Yixian

    2016-09-01

    Terrain aided navigation (TAN) is a form of geophysical localization technique for autonomous underwater vehicles (AUVs) operating in GPS-denied environments. TAN performance on sensor-rich AUVs has been evaluated in sea trials. However, many challenges remain before TAN can be successfully implemented on sensor-limited AUVs, especially with coarse maps. To improve TAN performance over coarse maps, a Gaussian process (GP) is proposed for the modeling of bathymetric terrain and integrated into the particle filter (GP-PF). GP is applied to provide not only the bathymetric value prediction through learning a set of bathymetric data from coarse maps but also the variance of the prediction. As a measurement update, calculated on bathymetric deviation is performed through the PF to obtain absolute and bounded positioning accuracy. Through the analysis of TAN performance on experimental data for two different terrains with map resolutions of 10-50 m, both the ability of the proposed model to represent the actual bathymetric terrain with accuracy and the effect of the GP-PF for TAN on sensor-limited systems in suited terrain are demonstrated. The experiment results further verify that there is an inverse relationship between the coarseness of the map and the overall TAN accuracy in rough terrains, but there is hardly any relationship between them in relatively flat terrains.

  10. End-to-end design consideration of a radar altimeter for terrain-aided navigation

    NASA Astrophysics Data System (ADS)

    Chun, Joohwan; Choi, Sanghyouk; Paek, Inchan; Park, Dongmin; Yoo, Kyungju

    2013-10-01

    We present a preliminary simulation study of an interferometric SAR altimeter for the terrain-aided navigation application. Our simulation includes raw SAR data generation, azimuth compression, leading edge detection of the echo signal, maximum likelihood angle estimation and the Bayesian state estimation. Sour results show that radar altimeter performance can be improved with the feedback loop from the rear-end navigation part.

  11. Integration of Visibility Sensors in NOAA PORTS® to aid in Decision Making for Safe Navigation

    NASA Astrophysics Data System (ADS)

    Roggenstein, E. B.

    2012-12-01

    The National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS) Physical Oceanographic Real-Time System (PORTS®) provides real-time water level, currents and meteorological data for aid to navigation in twenty-three major ports and harbors. In response to PORTS® users' requests for visibility data, NOS began testing several varieties of visibility sensors for operations in a marine environment. Extensive testing resulted in the selection of the Vaisala FS11 visibility sensor. The FS11 sensor uses forward scattering technology to measure the amount of scattering in a small volume of air between the transmitter and receiver, resulting in an extrapolated visibility at a set height out to 75 km. Two sensors have been successfully operating in the Mobile Bay PORTS® at Middle Bay Port and Pinto Island since installation in 2010. The sensors are positioned at a height of 3 m above the ground, 24 km apart along the western shore of the bay in areas susceptible to fog formation. Real-time data from these sensors are disseminated on NOAA's Center for Operational Oceanographic Products and Services (COOPS) PORTS® website every 6 minutes (min) and for distances up to 10 km (5.4 nm) from the instrument. This has proven to aid port pilots' decision making for safe movement of vessels in the harbor. Additionally, the Pinto Island sensor is located directly adjacent to the shipping channel - an area with high levels of atmospheric particulates of high carbon content. These particulates do not appear to have negatively affected sensor performance. This success has prompted interest in visibility sensors from other harbors with PORTS®. The ports of San Francisco, Narragansett Bay, Chesapeake Bay, Jacksonville FL, and Gulfport MS are planning or exploring the addition of visibility sensors to their PORTS® to aid in navigation. Additionally, the NOAA/COOPS Ocean System Test Evaluation Program (OSTEP) has continued with additional field testing of the FS11

  12. Airborne laser scanner aided inertial for terrain referenced navigation in unknown environments

    NASA Astrophysics Data System (ADS)

    Vadlamani, Ananth Kalyan

    A dead-reckoning terrain referenced navigation (TRN) system that uses airborne laser ranging sensors to aid an aircraft inertial navigation system (INS) is presented. Improved navigation performance is achieved through estimation of vehicle velocity and position using terrain measurements. The system only uses aircraft sensors and simultaneously performs the dual functions of mapping and navigation in unknown environments. The theory, algorithms and results of the system performance are presented using simulations and flight test data. This dissertation focuses primarily on the use of dual airborne laser scanners (ALS) for aiding an INS. Dual ALS measurements are used to generate overlapping terrain models, which are then used to estimate the INS velocity and position errors and constrain its drift. By keeping track of its errors, a navigation-grade INS is aided in a feed-forward manner. This dead-reckoning navigation algorithm is generic enough to be easily extendable to use other optical sensors. Data integrity, sensor alignment and the effects of vegetation noise, attitude and heading accuracy are analyzed. Furthermore, a feedback coupled aiding scheme is presented in which a tactical-grade inertial measurement unit (IMU) is aided with dual ALS measurements by feeding the estimated velocity back into the IMU computations. The proposed system can potentially serve as a backup during temporary Global Positioning System (GPS) signal outages, or it can be used to coast for extended periods of time. Although it has elements of conventional TRN, this system does not require a terrain database since its in-flight mapping capability generates the terrain data for navigation. Hence, the system can be used in both non-GPS as well as unknown terrain environments. The navigation system is dead-reckoning in nature and errors accumulate over time, unless the system can be reset periodically by geo-referenced terrain data or a position estimate from another navigation aid.

  13. 33 CFR 72.01-5 - Local Notice to Mariners.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Local Notice to Mariners. 72.01-5 Section 72.01-5 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO... Mariners free of charge on the Internet from the Coast Guard Navigation Center's Web site (http://www...

  14. 33 CFR 72.01-5 - Local Notice to Mariners.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Local Notice to Mariners. 72.01-5 Section 72.01-5 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO... Mariners free of charge on the Internet from the Coast Guard Navigation Center's Web site (http://www...

  15. 33 CFR 72.01-5 - Local Notice to Mariners.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Local Notice to Mariners. 72.01-5 Section 72.01-5 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO... Mariners free of charge on the Internet from the Coast Guard Navigation Center's Web site...

  16. Accuracy Evaluation of Stereo Vision Aided Inertial Navigation for Indoor Environments

    NASA Astrophysics Data System (ADS)

    Griessbach, D. G.; Baumbach, D. B.; Boerner, A. B.; Zuev, S. Z.

    2013-11-01

    Accurate knowledge of position and orientation is a prerequisite for many applications regarding unmanned navigation, mapping, or environmental modelling. GPS-aided inertial navigation is the preferred solution for outdoor applications. Nevertheless a similar solution for navigation tasks in difficult environments with erroneous or no GPS-data is needed. Therefore a stereo vision aided inertial navigation system is presented which is capable of providing real-time local navigation for indoor applications. A method is described to reconstruct the ego motion of a stereo camera system aided by inertial data. This, in turn, is used to constrain the inertial sensor drift. The optical information is derived from natural landmarks, extracted and tracked over consequent stereo image pairs. Using inertial data for feature tracking effectively reduces computational costs and at the same time increases the reliability due to constrained search areas. Mismatched features, e.g. at repetitive structures typical for indoor environments are avoided. An Integrated Positioning System (IPS) was deployed and tested on an indoor navigation task. IPS was evaluated for accuracy, robustness, and repeatability in a common office environment. In combination with a dense disparity map, derived from the navigation cameras, a high density point cloud is generated to show the capability of the navigation algorithm.

  17. NAVSIM 2: A computer program for simulating aided-inertial navigation for aircraft

    NASA Technical Reports Server (NTRS)

    Bjorkman, William S.

    1987-01-01

    NAVSIM II, a computer program for analytical simulation of aided-inertial navigation for aircraft, is described. The description is supported by a discussion of the program's application to the design and analysis of aided-inertial navigation systems as well as instructions for utilizing the program and for modifying it to accommodate new models, constraints, algorithms and scenarios. NAVSIM II simulates an airborne inertial navigation system built around a strapped-down inertial measurement unit and aided in its function by GPS, Doppler radar, altimeter, airspeed, and position-fix measurements. The measurements are incorporated into the navigation estimate via a UD-form Kalman filter. The simulation was designed and implemented using structured programming techniques and with particular attention to user-friendly operation.

  18. An Imaging Sensor-Aided Vision Navigation Approach that Uses a Geo-Referenced Image Database

    PubMed Central

    Li, Yan; Hu, Qingwu; Wu, Meng; Gao, Yang

    2016-01-01

    In determining position and attitude, vision navigation via real-time image processing of data collected from imaging sensors is advanced without a high-performance global positioning system (GPS) and an inertial measurement unit (IMU). Vision navigation is widely used in indoor navigation, far space navigation, and multiple sensor-integrated mobile mapping. This paper proposes a novel vision navigation approach aided by imaging sensors and that uses a high-accuracy geo-referenced image database (GRID) for high-precision navigation of multiple sensor platforms in environments with poor GPS. First, the framework of GRID-aided vision navigation is developed with sequence images from land-based mobile mapping systems that integrate multiple sensors. Second, a highly efficient GRID storage management model is established based on the linear index of a road segment for fast image searches and retrieval. Third, a robust image matching algorithm is presented to search and match a real-time image with the GRID. Subsequently, the image matched with the real-time scene is considered to calculate the 3D navigation parameter of multiple sensor platforms. Experimental results show that the proposed approach retrieves images efficiently and has navigation accuracies of 1.2 m in a plane and 1.8 m in height under GPS loss in 5 min and within 1500 m. PMID:26828496

  19. An Imaging Sensor-Aided Vision Navigation Approach that Uses a Geo-Referenced Image Database.

    PubMed

    Li, Yan; Hu, Qingwu; Wu, Meng; Gao, Yang

    2016-01-28

    In determining position and attitude, vision navigation via real-time image processing of data collected from imaging sensors is advanced without a high-performance global positioning system (GPS) and an inertial measurement unit (IMU). Vision navigation is widely used in indoor navigation, far space navigation, and multiple sensor-integrated mobile mapping. This paper proposes a novel vision navigation approach aided by imaging sensors and that uses a high-accuracy geo-referenced image database (GRID) for high-precision navigation of multiple sensor platforms in environments with poor GPS. First, the framework of GRID-aided vision navigation is developed with sequence images from land-based mobile mapping systems that integrate multiple sensors. Second, a highly efficient GRID storage management model is established based on the linear index of a road segment for fast image searches and retrieval. Third, a robust image matching algorithm is presented to search and match a real-time image with the GRID. Subsequently, the image matched with the real-time scene is considered to calculate the 3D navigation parameter of multiple sensor platforms. Experimental results show that the proposed approach retrieves images efficiently and has navigation accuracies of 1.2 m in a plane and 1.8 m in height under GPS loss in 5 min and within 1500 m.

  20. 75 FR 1799 - Terminate Long Range Aids to Navigation (Loran-C) Signal

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-13

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF HOMELAND SECURITY Coast Guard Terminate Long Range Aids to Navigation (Loran-C) Signal AGENCY: U.S. Coast Guard, DHS... Register of January 7, 2010 (75 FR 998). The document announced termination of the Long Range Aids...

  1. Navigation in GPS Denied Environments: Feature-Aided Inertial Systems

    DTIC Science & Technology

    2010-03-01

    navigation capability after a temporary loss , (h) is low-cost and low-weight, (i) does not require user motion to work, (j) shall have a level of...16]. If no a priori knowledge of the scene is provided, estimation of the navigation state is completely correlated with estimating the scene. This...motion is applied to synthesize a stereo-vision baseline, which is measured by the INS. Note that in this case a correlation between depth estimation

  2. 33 CFR 165.153 - Regulated Navigation Area: Long Island Sound Marine Inspection and Captain of the Port Zone.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Island Sound Marine Inspection and Captain of the Port Zone. 165.153 Section 165.153 Navigation and... Areas First Coast Guard District § 165.153 Regulated Navigation Area: Long Island Sound Marine... Island Sound Marine Inspection and Captain of the Port (COTP) Zone, as delineated in 33 CFR...

  3. 33 CFR 165.153 - Regulated Navigation Area: Long Island Sound Marine Inspection and Captain of the Port Zone.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Island Sound Marine Inspection and Captain of the Port Zone. 165.153 Section 165.153 Navigation and... Areas First Coast Guard District § 165.153 Regulated Navigation Area: Long Island Sound Marine... Island Sound Marine Inspection and Captain of the Port (COTP) Zone, as delineated in 33 CFR...

  4. 33 CFR 165.153 - Regulated Navigation Area: Long Island Sound Marine Inspection and Captain of the Port Zone.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Island Sound Marine Inspection and Captain of the Port Zone. 165.153 Section 165.153 Navigation and... Areas First Coast Guard District § 165.153 Regulated Navigation Area: Long Island Sound Marine... Island Sound Marine Inspection and Captain of the Port (COTP) Zone, as delineated in 33 CFR...

  5. 33 CFR 165.153 - Regulated Navigation Area: Long Island Sound Marine Inspection and Captain of the Port Zone.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Island Sound Marine Inspection and Captain of the Port Zone. 165.153 Section 165.153 Navigation and... Areas First Coast Guard District § 165.153 Regulated Navigation Area: Long Island Sound Marine... Island Sound Marine Inspection and Captain of the Port (COTP) Zone, as delineated in 33 CFR...

  6. Performance Analysis of Global Navigation Satellite System Signal Acquisition Aided by Different Grade Inertial Navigation System under Highly Dynamic Conditions

    PubMed Central

    Zhang, Chunxi; Li, Xianmu; Gao, Shuang; Lin, Tie; Wang, Lu

    2017-01-01

    Under the high dynamic conditions, Global Navigation Satellite System (GNSS) signals produce great Doppler frequency shifts, which hinders the fast acquisition of signals. Inertial Navigation System (INS)-aided acquisition can improve the acquisition performance, whereas the accuracy of Doppler shift and code phase estimation are mainly determined by the INS precision. The relation between the INS accuracy and Doppler shift estimation error has been derived, while the relation between the INS accuracy and code phase estimation error has not been deduced. In this paper, in order to theoretically analyze the effects of INS errors on the performance of Doppler shift and code phase estimations, the connections between them are re-deduced. Moreover, the curves of the corresponding relations are given for the first time. Then, in order to have a better verification of the INS-aided acquisition, a high dynamic scenario is designed. Furthermore, by using the deduced mathematical relation, the effects of different grade INS on the GNSS (including Global Positioning System (GPS) and BeiDou Navigation Satellite System (BDS)) signal acquisition are analyzed. Experimental results demonstrate that the INS-aided acquisition can reduce the search range of local frequency and code phase, and achieve fast acquisition. According to the experimental results, a suitable INS can be chosen for the deeply coupled integration. PMID:28452933

  7. Terrain-aided navigation of an unpowered tactical missile using autopilot-grade sensors

    NASA Astrophysics Data System (ADS)

    Longenbaker, W. E.

    1984-04-01

    The feasibility of applying a terrain-aided navigation concept (Sandia Inertial Terrain-Aided Navigation, or SITAN) to an unpowered tactical missile (USAF GBU-15) is considered. The brief flight time and predictable missile flight path dynamics lead to the definition of a velocity-based strap-down navigation algorithm that uses the existing autopilot-grade sensors. The navigation states are corrected by means of the error estimates of a Kalman filter. The filter makes use of frequent radar altimeter measurements and terrain slope information (derived from an on-board digitized map) to provide essentially continuous position updating. Covariance analysis and Monte Carlo simulation techniques are then applied to predict system performance. Results are obtained showing that the accuracy of this weapon/guidance combination is sufficient to defeat airfields with area munitions.

  8. Terrain-aided navigation of an unpowered tactical missile using autopilot-grade sensors

    NASA Astrophysics Data System (ADS)

    Longenbaker, W. E.

    The feasibility of applying a terrain-aided navigation concept (Sandia Inertial Terrain-Aided Navigation, or SITAN) to an unpowered tactical missile (USAF GBU-15) is considered. The brief flight time and predictable missile flight path dynamics lead to the definition of a velocity-based strap-down navigation algorithm that uses the existing autopilot-grade sensors. The navigation states are corrected by means of the error estimates of a Kalman filter. The filter makes use of frequent radar altimeter measurements and terrain slope information (derived from an on-board digitized map) to provide essentially continuous position updating. Covariance analysis and Monte Carlo simulation techniques are then applied to predict system performance. Results are obtained showing that the accuracy of this weapon/guidance combination is sufficient to defeat airfields with area munitions.

  9. Real Time Mars Approach Navigation Aided by the Mars Network

    NASA Technical Reports Server (NTRS)

    Ely, Todd A.; Duncan, Courtney; Lightsey, E. Glenn; Mogensen, Andreas

    2006-01-01

    A NASA Mars technology project is described that is building a prototype embedded real time Mars approach navigation capability which can be hosted on the Mars Network's Electra transceiver. The paper motivates the reason for doing real time Mars approach navigation via a set of analyses demonstrating its utility for enabling Mars pin-point landing (less than 1-km landing error). The development approach, software design, and test results are discussed. Finally, the way forward towards a flight demonstration on the Mars Science Laboratory (MSL) is presented.

  10. Real Time Mars Approach Navigation Aided by the Mars Network

    NASA Technical Reports Server (NTRS)

    Ely, Todd A.; Duncan, Courtney; Lightsey, E. Glenn; Mogensen, Andreas

    2006-01-01

    A NASA Mars technology project is described that is building a prototype embedded real time Mars approach navigation capability which can be hosted on the Mars Network's Electra transceiver. The paper motivates the reason for doing real time Mars approach navigation via a set of analyses demonstrating its utility for enabling Mars pin-point landing (< 1-km landing error). The development approach, software design, and test results are discussed. Finally, the way forward towards a flight demonstration on the Mars Science Laboratory is presented.

  11. All Source Adaptive Fusion for Aided Navigation in Non-GPS Environment

    DTIC Science & Technology

    2007-04-01

    providing navigation aiding in the GPS - denied environment as well as obstacle avoidance and 3-D digital terrain mapping in the presence of GPS. The 3-D...fusing optical flow, star-tracking measurements with inertial data, navigation accuracy in a GPS - denied environment is obtained that is superior to...degrees. Figure 8 shows the target location errors (TLE) for INS/GPS only, compared with the results for INS/GPS plus feature tracking, again with GPS

  12. Error Characterization of Vision-Aided Navigation Systems

    DTIC Science & Technology

    2013-03-01

    iv EKF Extended Kalman Filter . . . . . . . . . . . . . . . . . . . . . . . . . . iv GNSS Global Navigation Satellite System...Satellite Systems ( GNSS ), of which GPS is an example, suffer from availability restrictions when satellite signals are physically blocked in areas...ION GNSS 2006, 1093–1103. Sep 2006. [24] Veth, M., J. Raquet, and M. Pachter. “Stochastic Constraints for Efficient Image Correspondence Search”. IEEE

  13. Flight evaluation of differential GPS aided inertial navigation systems

    NASA Technical Reports Server (NTRS)

    Mcnally, B. David; Paielli, Russell A.; Bach, Ralph E., Jr.; Warner, David N., Jr.

    1992-01-01

    Algorithms are described for integration of Differential Global Positioning System (DGPS) data with Inertial Navigation System (INS) data to provide an integrated DGPS/INS navigation system. The objective is to establish the benefits that can be achieved through various levels of integration of DGPS with INS for precision navigation. An eight state Kalman filter integration was implemented in real-time on a twin turbo-prop transport aircraft to evaluate system performance during terminal approach and landing operations. A fully integrated DGPS/INS system is also presented which models accelerometer and rate-gyro measurement errors plus position, velocity, and attitude errors. The fully integrated system was implemented off-line using range-domain (seventeen-state) and position domain (fifteen-state) Kalman filters. Both filter integration approaches were evaluated using data collected during the flight test. Flight-test data consisted of measurements from a 5 channel Precision Code GPS receiver, a strap-down Inertial Navigation Unit (INU), and GPS satellite differential range corrections from a ground reference station. The aircraft was laser tracked to determine its true position. Results indicate that there is no significant improvement in positioning accuracy with the higher levels of DGPS/INS integration. All three systems provided high-frequency (e.g., 20 Hz) estimates of position and velocity. The fully integrated system provided estimates of inertial sensor errors which may be used to improve INS navigation accuracy should GPS become unavailable, and improved estimates of acceleration, attitude, and body rates which can be used for guidance and control. Precision Code DGPS/INS positioning accuracy (root-mean-square) was 1.0 m cross-track and 3.0 m vertical. (This AGARDograph was sponsored by the Guidance and Control Panel.)

  14. Flight evaluation of differential GPS aided inertial navigation systems

    NASA Technical Reports Server (NTRS)

    Mcnally, B. David; Paielli, Russell A.; Bach, Ralph E., Jr.; Warner, David N., Jr.

    1992-01-01

    Algorithms are described for integration of Differential Global Positioning System (DGPS) data with Inertial Navigation System (INS) data to provide an integrated DGPS/INS navigation system. The objective is to establish the benefits that can be achieved through various levels of integration of DGPS with INS for precision navigation. An eight state Kalman filter integration was implemented in real-time on a twin turbo-prop transport aircraft to evaluate system performance during terminal approach and landing operations. A fully integrated DGPS/INS system is also presented which models accelerometer and rate-gyro measurement errors plus position, velocity, and attitude errors. The fully integrated system was implemented off-line using range-domain (seventeen-state) and position domain (fifteen-state) Kalman filters. Both filter integration approaches were evaluated using data collected during the flight test. Flight-test data consisted of measurements from a 5 channel Precision Code GPS receiver, a strap-down Inertial Navigation Unit (INU), and GPS satellite differential range corrections from a ground reference station. The aircraft was laser tracked to determine its true position. Results indicate that there is no significant improvement in positioning accuracy with the higher levels of DGPS/INS integration. All three systems provided high-frequency (e.g., 20 Hz) estimates of position and velocity. The fully integrated system provided estimates of inertial sensor errors which may be used to improve INS navigation accuracy should GPS become unavailable, and improved estimates of acceleration, attitude, and body rates which can be used for guidance and control. Precision Code DGPS/INS positioning accuracy (root-mean-square) was 1.0 m cross-track and 3.0 m vertical. (This AGARDograph was sponsored by the Guidance and Control Panel.)

  15. An improved TERCOM algorithm and its application in a submarine terrain aided navigation system

    NASA Astrophysics Data System (ADS)

    Xu, Zunyi; Yan, Lei; Liu, Guangjun; Wang, Hua

    2006-10-01

    Terrain contour matching (TERCOM) algorithm is the main one in the conventional terrain aided navigation system. When it has been directly applied to the submarine terrain aided navigation (STAN) system, the accuracy and stability are primely reduced. To solve these problems, the detail analyses about the particularities of the STAN and the disadvantages of the conventional TERCOM algorithm have been made. The improvement for the TERCOM algorithm on the measurement function, the water depth survey error and the scheme to prevent fail positioning has been done. Moreover, experiments with pedestrian simulation confirm the effectiveness of the improved TERCOM algorithm. The system achieves higher positioning precision than that of conventional one.

  16. 33 CFR 70.05-10 - Revocation of merchant mariner credential officer endorsement or license.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Revocation of merchant mariner... NAVIGATION Collision With or Damage to Aids to Navigation § 70.05-10 Revocation of merchant mariner... his merchant mariner credential officer endorsement or license revoked or suspended for a term to...

  17. The Vector Matching Method in Geomagnetic Aiding Navigation.

    PubMed

    Song, Zhongguo; Zhang, Jinsheng; Zhu, Wenqi; Xi, Xiaoli

    2016-07-20

    In this paper, a geomagnetic matching navigation method that utilizes the geomagnetic vector is developed, which can greatly improve the matching probability and positioning precision, even when the geomagnetic entropy information in the matching region is small or the geomagnetic contour line's variety is obscure. The vector iterative closest contour point (VICCP) algorithm that is proposed here has better adaptability with the positioning error characteristics of the inertial navigation system (INS), where the rigid transformation in ordinary ICCP is replaced with affine transformation. In a subsequent step, a geomagnetic vector information fusion algorithm based on Bayesian statistical analysis is introduced into VICCP to improve matching performance further. Simulations based on the actual geomagnetic reference map have been performed for the validation of the proposed algorithm.

  18. The Vector Matching Method in Geomagnetic Aiding Navigation

    PubMed Central

    Song, Zhongguo; Zhang, Jinsheng; Zhu, Wenqi; Xi, Xiaoli

    2016-01-01

    In this paper, a geomagnetic matching navigation method that utilizes the geomagnetic vector is developed, which can greatly improve the matching probability and positioning precision, even when the geomagnetic entropy information in the matching region is small or the geomagnetic contour line’s variety is obscure. The vector iterative closest contour point (VICCP) algorithm that is proposed here has better adaptability with the positioning error characteristics of the inertial navigation system (INS), where the rigid transformation in ordinary ICCP is replaced with affine transformation. In a subsequent step, a geomagnetic vector information fusion algorithm based on Bayesian statistical analysis is introduced into VICCP to improve matching performance further. Simulations based on the actual geomagnetic reference map have been performed for the validation of the proposed algorithm. PMID:27447645

  19. Design and performance analysis of a low-cost aided dead reckoning navigator

    NASA Astrophysics Data System (ADS)

    Gebre-Egziabher, Demoz

    The Federal Aviation Administration is leading the National Airspace System (NAS) modernization effort, in part, by supplanting traditional air traffic services with the Global Positioning System (GPS) aided by the Wide and Local Area Augmentation Systems (WAAS & LAAS). Making GPS the primary-means of navigation will enhance safety, flexibility and efficiency of operations for all aircraft ranging from single engine general aviation aircraft to complex commercial jet-liners. This transformation of the NAS will be gradual and the build-up to a primary-means GPS capability is expected to occur concurrently with the de-commissioning of a significant number of existing ground-based navigational facilities. If an alternate means of navigation is not available during this transition period, temporary interruptions of GPS services due to intentional or unintentional interference could present significant problems for aircraft lacking backup navigation capability. To successfully deal with such outage scenarios, a NAS architecture consisting of a skeletal network of Distance Measuring Equipment (DME) transponders to provide a redundant navigation capability alongside GPS/WAAS during this transition period is proposed. DME range measurements fused with a low cost dead-reckoning system can provide a navigation performance comparable to VOR and LORAN. This navigation scheme allows reducing the number of operational radio-navigation aids while maintaining an adequate coverage for navigation during the transition to a primary-means GPS NAS. The dead-reckoning navigation system is based on the fusion of a single low-end DME receiver with low cost inertial, air-data and magnetic sensors. These sensors are already part of the newer general aviation aircraft's suite of navigation sensors. Estimator architectures for fusing the information from the various sensors is presented. The performance of this navigator depends on the calibration and on-line estimation of sensor errors

  20. RFID based indoor navigational aid for persons with severe visual impairments.

    PubMed

    Szeto, Andrew Y J; Sharma, Satish K

    2007-01-01

    A flexible, low cost, and portable indoor navigational aid for persons who are blind or have severe visual impairments remains an unmet need and a technical challenge. Whereas devices using global positioning system (GPS) signals hold promise for navigational assistance in the outdoor environment, they do not work where GPS signals are absent or greatly attenuated. Thus a network of navigational beacons is needed for the indoor environment. This paper describes the promise of an indoor navigational aid that relies on a network of custom extended-range RFID tags. RFID (radio-frequency identification) technology has the advantages of being low cost, unobtrusive, and highly flexible in the sense that sight impaired travelers can use personalized RFID tags to mark indoor locations of their particular interest. However, commercially available RFID tags have very short detection ranges. To make them suitable as indoor electronic beacons, their range of detection must be greatly extended. Some of the technical challenges and proposed solutions that can extend the detection range are discussed in this paper following an overview of the proposed RFID based indoor navigational aid.

  1. 33 CFR 72.01-10 - Notice to Mariners.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Notice to Mariners. 72.01-10 Section 72.01-10 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO... access Notice to Mariners through the National Geospatial-Intelligence Agency's Web site (http://pollux...

  2. 33 CFR 72.01-10 - Notice to Mariners.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Notice to Mariners. 72.01-10 Section 72.01-10 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO... access Notice to Mariners through the National Geospatial-Intelligence Agency's Web site (http://pollux...

  3. 33 CFR 72.01-10 - Notice to Mariners.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Notice to Mariners. 72.01-10 Section 72.01-10 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO... access Notice to Mariners through the National Geospatial-Intelligence Agency's Web site...

  4. 76 FR 77585 - Notice to Manufacturers of Airport Lighting and Navigation Aid Equipment

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-13

    ...Projects funded under the Airport Improvement Program (AIP) must meet the requirements of 49 U.S.C. 50101, Buy American Preferences. The Federal Aviation Administration (FAA) is considering issuing waivers to foreign manufacturers of certain airport lighting and navigation aid equipment that is lit with Light Emitting Diode (LED) lighting. This notice requests information from manufacturers of......

  5. Marine and Hydrokinetic Renewable Energy Devices, Potential Navigational Hazards and Mitigation Measures

    SciTech Connect

    Cool, Richard, M.; Hudon, Thomas, J.; Basco, David, R.; Rondorf, Neil, E.

    2009-12-01

    On April 15, 2008, the Department of Energy (DOE) issued a Funding Opportunity Announcement for Advanced Water Power Projects which included a Topic Area for Marine and Hydrokinetic Renewable Energy Market Acceleration Projects. Within this Topic Area, DOE identified potential navigational impacts of marine and hydrokinetic renewable energy technologies and measures to prevent adverse impacts on navigation as a sub-topic area. DOE defines marine and hydrokinetic technologies as those capable of utilizing one or more of the following resource categories for energy generation: ocean waves; tides or ocean currents; free flowing water in rivers or streams; and energy generation from the differentials in ocean temperature. PCCI was awarded Cooperative Agreement DE-FC36-08GO18177 from the DOE to identify the potential navigational impacts and mitigation measures for marine hydrokinetic technologies. A technical report addressing our findings is available on this Science and Technology Information site under the Product Title, "Marine and Hydrokinetic Renewable Energy Technologies: Potential Navigational Impacts and Mitigation Measures". This product is a brochure, primarily for project developers, that summarizes important issues in that more comprehensive report, identifies locations where that report can be downloaded, and identifies points of contact for more information.

  6. Ames-aided inertial navigation work - The first two years of progress

    NASA Technical Reports Server (NTRS)

    Smith, G. L.

    1973-01-01

    A description of work whose broad objective is to attain improved aircraft navigation performance through exploitation of the concept of combining navigation data from several sources in an optimum manner is presented. The system developed as a result of the work, called RAINPAL (Recursive Aided Inertial Navigation for Precision Approach and Landing) is designed to combine precision radio range measurements with data from on-board inertial sensors to achieve precision navigation for approach and landing. The paper describes RAINPAL and the rationale of its design, and also serves as a sort of planning document, including a progress report, a summary of objectives past and present, and an exposition of reasons for doing the work.

  7. Marine and Hydrokinetic Renewable Energy Technologies: Potential Navigational Impacts and Mitigation Measures

    SciTech Connect

    Cool, Richard, M.; Hudon, Thomas, J.; Basco, David, R.; Rondorf, Neil, E.

    2009-12-10

    On April 15, 2008, the Department of Energy (DOE) issued a Funding Opportunity Announcement for Advanced Water Power Projects which included a Topic Area for Marine and Hydrokinetic Renewable Energy Market Acceleration Projects. Within this Topic Area, DOE identified potential navigational impacts of marine and hydrokinetic renewable energy technologies and measures to prevent adverse impacts on navigation as a sub-topic area. DOE defines marine and hydrokinetic technologies as those capable of utilizing one or more of the following resource categories for energy generation: ocean waves; tides or ocean currents; free flowing water in rivers or streams; and energy generation from the differentials in ocean temperature. PCCI was awarded Cooperative Agreement DE-FC36-08GO18177 from the DOE to identify the potential navigational impacts and mitigation measures for marine hydrokinetic technologies, as summarized herein. The contract also required cooperation with the U.S. Coast Guard (USCG) and two recipients of awards (Pacific Energy Ventures and reVision) in a sub-topic area to develop a protocol to identify streamlined, best-siting practices. Over the period of this contract, PCCI and our sub-consultants, David Basco, Ph.D., and Neil Rondorf of Science Applications International Corporation, met with USCG headquarters personnel, with U.S. Army Corps of Engineers headquarters and regional personnel, with U.S. Navy regional personnel and other ocean users in order to develop an understanding of existing practices for the identification of navigational impacts that might occur during construction, operation, maintenance, and decommissioning. At these same meetings, “standard” and potential mitigation measures were discussed so that guidance could be prepared for project developers. Concurrently, PCCI reviewed navigation guidance published by the USCG and international community. This report summarizes the results of this effort, provides guidance in the form of a

  8. An IMM-Aided ZUPT Methodology for an INS/DVL Integrated Navigation System.

    PubMed

    Yao, Yiqing; Xu, Xiaosu; Xu, Xiang

    2017-09-05

    Inertial navigation system (INS)/Doppler velocity log (DVL) integration is the most common navigation solution for underwater vehicles. Due to the complex underwater environment, the velocity information provided by DVL always contains some errors. To improve navigation accuracy, zero velocity update (ZUPT) technology is considered, which is an effective algorithm for land vehicles to mitigate the navigation error during the pure INS mode. However, in contrast to ground vehicles, the ZUPT solution cannot be used directly for underwater vehicles because of the existence of the water current. In order to leverage the strengths of the ZUPT method and the INS/DVL solution, an interactive multiple model (IMM)-aided ZUPT methodology for the INS/DVL-integrated underwater navigation system is proposed. Both the INS/DVL and INS/ZUPT models are constructed and operated in parallel, with weights calculated according to their innovations and innovation covariance matrices. Simulations are conducted to evaluate the proposed algorithm. The results indicate that the IMM-aided ZUPT solution outperforms both the INS/DVL solution and the INS/ZUPT solution in the underwater environment, which can properly distinguish between the ZUPT and non-ZUPT conditions. In addition, during DVL outage, the effectiveness of the proposed algorithm is also verified.

  9. AFTI/SITAN (Advanced Fighter Technology Integration/Sandia Inertial Terrain-Aided Navigation) final report

    SciTech Connect

    Fellerhoff, J.R.

    1988-11-01

    Sandia Inertial Terrain-Aided Navigation (SITAN) provides continuous position fixes to an inertial navigation system (INS) by real-time comparison of radar altimeter ground clearance measurements with stored digital terrain elevation data (DTED). This is accomplished by using an extended Kalman filter algorithm to estimate the errors in the reference trajectory provided by an INS. In this report, Sandia National Laboratories documents the results of a reimbursable effort funded by the Air Force Wright Aeronautical Laboratories (AFWAL) Avionics Laboratory to flight test SITAN as implemented onboard the Advanced Fighter Technology Integration (AFTI)F-16. 5 refs., 101 figs., 1 tab.

  10. Study of the Performance of Aids to Navigation Systems - Phase 1, An Empirical Model Approach

    DTIC Science & Technology

    1978-07-19

    OMEGA5 +i.0 NM (day) + 1.0 NM (day) +2,0 NM (night) +2.0 NM (night) RDF6 + 5 dog 1 deg roundoff "+5.05 dec plus gyro error 1 deg roundoff SPEED LOG 7...gI𔄁 UU zz w : Or 31VI DNi ’# 0..I 5.3.1 Sample Scenario Evaluation: Florida Keys A sample coastwise passage between Carysfort Reef and Tennessee Reef...the Institute of Navigation, vol 21:2 (Summer 1974), 117-133. Blood , E.B. "Navigation Aid Requirements for the U.S. Coastal Confluence Region," Journal

  11. High-precision image aided inertial navigation with known features: observability analysis and performance evaluation.

    PubMed

    Jiang, Weiping; Wang, Li; Niu, Xiaoji; Zhang, Quan; Zhang, Hui; Tang, Min; Hu, Xiangyun

    2014-10-17

    A high-precision image-aided inertial navigation system (INS) is proposed as an alternative to the carrier-phase-based differential Global Navigation Satellite Systems (CDGNSSs) when satellite-based navigation systems are unavailable. In this paper, the image/INS integrated algorithm is modeled by a tightly-coupled iterative extended Kalman filter (IEKF). Tightly-coupled integration ensures that the integrated system is reliable, even if few known feature points (i.e., less than three) are observed in the images. A new global observability analysis of this tightly-coupled integration is presented to guarantee that the system is observable under the necessary conditions. The analysis conclusions were verified by simulations and field tests. The field tests also indicate that high-precision position (centimeter-level) and attitude (half-degree-level)-integrated solutions can be achieved in a global reference.

  12. High-Precision Image Aided Inertial Navigation with Known Features: Observability Analysis and Performance Evaluation

    PubMed Central

    Jiang, Weiping; Wang, Li; Niu, Xiaoji; Zhang, Quan; Zhang, Hui; Tang, Min; Hu, Xiangyun

    2014-01-01

    A high-precision image-aided inertial navigation system (INS) is proposed as an alternative to the carrier-phase-based differential Global Navigation Satellite Systems (CDGNSSs) when satellite-based navigation systems are unavailable. In this paper, the image/INS integrated algorithm is modeled by a tightly-coupled iterative extended Kalman filter (IEKF). Tightly-coupled integration ensures that the integrated system is reliable, even if few known feature points (i.e., less than three) are observed in the images. A new global observability analysis of this tightly-coupled integration is presented to guarantee that the system is observable under the necessary conditions. The analysis conclusions were verified by simulations and field tests. The field tests also indicate that high-precision position (centimeter-level) and attitude (half-degree-level)-integrated solutions can be achieved in a global reference. PMID:25330046

  13. Research on aided navigation based on terrain elevation matching and simulation

    NASA Astrophysics Data System (ADS)

    He, Yanping; Liu, Xinxue; Cai, Yanping; Zhu, Yu

    2016-01-01

    The matching function of terrain-aided navigation is not only related to the algorithm, also associated with the terrain characteristics of matching area. Aiming at terrain matching area selection and matching algorithm of the terrain height matching system, the method of terrain information entropy is put forward on the basis of statistical characteristics of the terrain roughness, signal-to-noise ratio, and then COR algorithm, MAD algorithm, MSD algorithm is adopted for real-time map and reference map matching, finally shows the simulation comparison of three kinds of matching algorithm. Result of simulation shows that among the index of matching accuracy and speed of three kinds of algorithm, COR algorithm possess fastest calculation speed and lowest precision, matching accuracy of MSD is slightly higher than MAD algorithm and calculation speed of MSD is placed in the middle, and the simulation results provide selection basis for terrain-aided inertial navigation.

  14. Research on positioning mode of LADAR aided navigation system over plain area

    NASA Astrophysics Data System (ADS)

    Lin, Yi; Yan, Lei; Tong, Qingxi

    2007-11-01

    Laser Radar (LADAR) achieves more applications on aerial aided-navigation in mountainous areas for its good performance. But plain areas encounter terrain elevation's slow variation and occasional unavailability of Digital Feature Analysis Database (DFAD), which as necessary reference. Looking for replaceable map source and extracting common characters for matching, are the fundamental circles of imaging LADAR aided navigation research. In this paper aerial high-resolution remote sensing (RS) images are applied as substitute for DFAD, and the edge factor is chosen out by synthetically analyzing RS images' and imaging LADAR point cloud'scharacters. Then edge extraction algorithm based on multi-scale wavelet is explored to reflect their common features, and weighted Hausdorff distance method is applied to match for positioning. At last the high-resolution RS images and imaging LADAR data of the same area are assumed for simulation experiment, which testifies the validity of the methods proposed above.

  15. Computer-aided navigation for arthroscopic hip surgery using encoder linkages for position tracking.

    PubMed

    Monahan, Emily; Shimada, Kenji

    2006-09-01

    While arthroscopic surgery has many advantages over traditional surgery, this minimally invasive technique is not often applied to the hip joint. Two main reasons for this are the complexity of navigating within the joint and the difficulty of correctly placing portal incisions without damaging critical neurovascular structures. This paper proposes a computer-aided navigation system to address the challenges of arthroscopic hip surgery. Unlike conventional arthroscopic methods, our system uses a hyper-redundant encoder linkage to track surgical instruments, thus eliminating the occlusion and distortion problems associated with standard optical and electromagnetic tracking systems. The encoder linkage position information is used to generate a computer display of patient anatomy. The tracking error from the encoder linkage was evaluated to be within an acceptable range for this tracking prototype, and the new computer-aided approach to arthroscopic hip surgery was applied to a prototype system for concept verification. This navigation system for arthroscopic hip surgery can be used as a tool to address the challenges of joint navigation and portal placement in arthroscopic hip surgery by visually supplementing the limiting view from the arthroscope. The introduction of a tracking linkage shows significant potential as an alternative to other tracking systems. Positive feedback about the completed demo system was obtained from surgeons who perform arthroscopic procedures. Copyright 2006 John Wiley & Sons, Ltd.

  16. Aid to Navigation Configurations and the Physical Characteristics of Waterways in 32 Major U. S. Ports.

    DTIC Science & Technology

    1979-10-01

    into the physical charac- teristics of channel design and the present aids to navigation of 32 prom- inent U.S. ports. The findings show trends in...These findings present a general analysis of what actually exists in the major U.S. shipping’ lanes.. 17. Kay Words 18. Distribution Statement .’Aids...Straight Channels and Turns 5 2 Physical Dimensions of Straight Channels 8 2.0 Introduction 8 * 2.1 Summary of Findings for Straight * Channels 8 * 2.2

  17. Offshore Renewable Energy Installations: Impact on Navigation and Marine Safety

    DTIC Science & Technology

    2011-01-01

    rine current turbines , and wave generators (hy- drokinectics). All these technologies have the potential to affect marine navi- gation and safety, and...countries. Of the technologies being considered, wind farms and hydrokinetics pique the Coast Guard’s inter- est because their developers propose to... turbines used to produce electric power and is typically located off-shore to take advantage of strong winds blowing over the surface of an ocean or lake

  18. Navigation study on improvements to existing federal navigation channels Arthur Kill Channel, Howland Hook Marine Terminal, Staten Island, New York

    SciTech Connect

    Not Available

    1985-06-01

    Improvements to the Arthur Kill Channel from the confluence of the Kill Van Kull Channel, the Arthur Kill Channel, and Newark Bay, along the Arthur Kill to the vicinity of Howland Hook Marine Terminal on Staten Island, New York are proposed. In addition, the study area was extended south from Howland Hook Terminal for approximately one mile in order to serve two oil terminals. The recommended improvements would include deepening to various depths down to 45 feet mean low water (MLW), widening the channel for unrestricted two-way traffic, and the creation of a turning basin. Specifically, a 41-foot MLW deep channel would be dredged in the previously authorized 35-foot MLW project in the Arthur Kill Channel from its confluence with the Newark Bay and Kill Van Kull channels to the Howland Hook Marine Terminal for a distance of approximately 2.1 miles. Also recommended are selected widenings and realignments of the channel at a depth of 41 feet in the interest of navigational safety. Additionally, a 40-foot MLW channel is proposed in the previously authorized 35-foot MLW project in the Arthur Kill Channel from the Howland Hook Marine Terminal to the Exxon Bayway and Gulfport facilities for a distance of approximately one mile. The channel would be selectively realigned to a 40-foot depth for navigational safety. No final determination has been made regarding the disposal of dredged material due to the uncertainty of available upland sites at this time. The turning basin would lie in the Kill Van Kull Channel at Bergen Point, where vessels turn from Kill Van Kull into Arthur Kill and Newark Bay. Total cost of the recommended plan is $49.4 million; the benefit-cost ratio is 4.35. The plan would take 4 years for completion and would have a projected life of 50 years.

  19. LiDAR Scan Matching Aided Inertial Navigation System in GNSS-Denied Environments.

    PubMed

    Tang, Jian; Chen, Yuwei; Niu, Xiaoji; Wang, Li; Chen, Liang; Liu, Jingbin; Shi, Chuang; Hyyppä, Juha

    2015-07-10

    A new scan that matches an aided Inertial Navigation System (INS) with a low-cost LiDAR is proposed as an alternative to GNSS-based navigation systems in GNSS-degraded or -denied environments such as indoor areas, dense forests, or urban canyons. In these areas, INS-based Dead Reckoning (DR) and Simultaneous Localization and Mapping (SLAM) technologies are normally used to estimate positions as separate tools. However, there are critical implementation problems with each standalone system. The drift errors of velocity, position, and heading angles in an INS will accumulate over time, and on-line calibration is a must for sustaining positioning accuracy. SLAM performance is poor in featureless environments where the matching errors can significantly increase. Each standalone positioning method cannot offer a sustainable navigation solution with acceptable accuracy. This paper integrates two complementary technologies-INS and LiDAR SLAM-into one navigation frame with a loosely coupled Extended Kalman Filter (EKF) to use the advantages and overcome the drawbacks of each system to establish a stable long-term navigation process. Static and dynamic field tests were carried out with a self-developed Unmanned Ground Vehicle (UGV) platform-NAVIS. The results prove that the proposed approach can provide positioning accuracy at the centimetre level for long-term operations, even in a featureless indoor environment.

  20. LiDAR Scan Matching Aided Inertial Navigation System in GNSS-Denied Environments

    PubMed Central

    Tang, Jian; Chen, Yuwei; Niu, Xiaoji; Wang, Li; Chen, Liang; Liu, Jingbin; Shi, Chuang; Hyyppä, Juha

    2015-01-01

    A new scan that matches an aided Inertial Navigation System (INS) with a low-cost LiDAR is proposed as an alternative to GNSS-based navigation systems in GNSS-degraded or -denied environments such as indoor areas, dense forests, or urban canyons. In these areas, INS-based Dead Reckoning (DR) and Simultaneous Localization and Mapping (SLAM) technologies are normally used to estimate positions as separate tools. However, there are critical implementation problems with each standalone system. The drift errors of velocity, position, and heading angles in an INS will accumulate over time, and on-line calibration is a must for sustaining positioning accuracy. SLAM performance is poor in featureless environments where the matching errors can significantly increase. Each standalone positioning method cannot offer a sustainable navigation solution with acceptable accuracy. This paper integrates two complementary technologies—INS and LiDAR SLAM—into one navigation frame with a loosely coupled Extended Kalman Filter (EKF) to use the advantages and overcome the drawbacks of each system to establish a stable long-term navigation process. Static and dynamic field tests were carried out with a self-developed Unmanned Ground Vehicle (UGV) platform—NAVIS. The results prove that the proposed approach can provide positioning accuracy at the centimetre level for long-term operations, even in a featureless indoor environment. PMID:26184206

  1. Methods and software tools for computer-aided design of the spacecraft guidance, navigation and control systems

    NASA Astrophysics Data System (ADS)

    Somov, Yevgeny; Oparin, Gennady

    2017-01-01

    We shortly present results on development and employment of the software systems for computer-aided design of the spacecraft guidance. navigation and control systems - modeling, synthesis, nonlinear analysis, simulation and graphic mapping of dynamic processes.

  2. Navigational ultrasound imaging: A novel imaging tool for aiding interventional therapies of equine musculoskeletal injuries.

    PubMed

    Lustgarten, M; Redding, W R; Schnabel, L V; Prange, T; Seiler, G S

    2016-03-01

    Navigational ultrasound imaging, also known as fusion imaging, is a novel technology that allows real-time ultrasound imaging to be correlated with a previously acquired computed tomography (CT) or magnetic resonance imaging (MRI) study. It has been used in man to aid interventional therapies and has been shown to be valuable for sampling and assessing lesions diagnosed with MRI or CT that are equivocal on ultrasonography. To date, there are no reports of the use of this modality in veterinary medicine. To assess whether navigational ultrasound imaging can be used to assist commonly performed interventional therapies for the treatment of equine musculoskeletal injuries diagnosed with MRI and determine the appropriateness of regional anatomical landmarks as registration sites. Retrospective, descriptive clinical study. Horses with musculoskeletal injuries of the distal limb diagnosed with MRI scheduled for ultrasound-guided interventional therapies were evaluated (n = 17 horses with a total of 29 lesions). Anatomical landmarks used for image registration for the navigational procedure were documented. Accuracy of lesion location and success of the procedure were assessed subjectively and described using a grading scale. All procedures were accurately registered using regional anatomical landmarks and considered successful based on our criteria. Anatomical landmarks were described for each lesion type. The addition of navigational imaging was considered to greatly aid the procedures in 59% of cases and added information to the remainder of the procedures. The technique was considered to improve the precision of these interventional procedures. Navigational ultrasound imaging is a complementary imaging modality that can be used for the treatment of equine soft tissue musculoskeletal injuries diagnosed with MRI. © 2015 EVJ Ltd.

  3. A review of computer-aided oral and maxillofacial surgery: planning, simulation and navigation.

    PubMed

    Chen, Xiaojun; Xu, Lu; Sun, Yi; Politis, Constantinus

    2016-11-01

    Currently, oral and maxillofacial surgery (OMFS) still poses a significant challenge for surgeons due to the anatomic complexity and limited field of view of the oral cavity. With the great development of computer technologies, he computer-aided surgery has been widely used for minimizing the risks and improving the precision of surgery. Areas covered: The major goal of this paper is to provide a comprehensive reference source of current and future development of computer-aided OMFS including surgical planning, simulation and navigation for relevant researchers. Expert commentary: Compared with the traditional OMFS, computer-aided OMFS overcomes the disadvantage that the treatment on the region of anatomically complex maxillofacial depends almost exclusively on the experience of the surgeon.

  4. The contribution of virtual reality to the diagnosis of spatial navigation disorders and to the study of the role of navigational aids: A systematic literature review.

    PubMed

    Cogné, M; Taillade, M; N'Kaoua, B; Tarruella, A; Klinger, E; Larrue, F; Sauzéon, H; Joseph, P-A; Sorita, E

    2017-06-01

    Spatial navigation, which involves higher cognitive functions, is frequently implemented in daily activities, and is critical to the participation of human beings in mainstream environments. Virtual reality is an expanding tool, which enables on one hand the assessment of the cognitive functions involved in spatial navigation, and on the other the rehabilitation of patients with spatial navigation difficulties. Topographical disorientation is a frequent deficit among patients suffering from neurological diseases. The use of virtual environments enables the information incorporated into the virtual environment to be manipulated empirically. But the impact of manipulations seems differ according to their nature (quantity, occurrence, and characteristics of the stimuli) and the target population. We performed a systematic review of research on virtual spatial navigation covering the period from 2005 to 2015. We focused first on the contribution of virtual spatial navigation for patients with brain injury or schizophrenia, or in the context of ageing and dementia, and then on the impact of visual or auditory stimuli on virtual spatial navigation. On the basis of 6521 abstracts identified in 2 databases (Pubmed and Scopus) with the keywords « navigation » and « virtual », 1103 abstracts were selected by adding the keywords "ageing", "dementia", "brain injury", "stroke", "schizophrenia", "aid", "help", "stimulus" and "cue"; Among these, 63 articles were included in the present qualitative analysis. Unlike pencil-and-paper tests, virtual reality is useful to assess large-scale navigation strategies in patients with brain injury or schizophrenia, or in the context of ageing and dementia. Better knowledge about both the impact of the different aids and the cognitive processes involved is essential for the use of aids in neurorehabilitation. Copyright © 2016. Published by Elsevier Masson SAS.

  5. Joint inversion for transmitter navigation and seafloor resistivity for frequency-domain marine CSEM data

    NASA Astrophysics Data System (ADS)

    Li, Gang; Li, Yuguo

    2017-01-01

    We present a joint inversion method for the transmitter navigation and the seafloor resistivity for frequency domain marine controlled-source electromagnetic (CSEM) data. The inversion approach is based on the modified BFGS scheme, which has an advantage that one can update the Hessian matrix by using the BFGS scheme rather than computing the Hessian matrix itself during the inversion process. The partial derivatives of the electromagnetic field responses with respect to both the seafloor resistivity and the transmitter navigation parameters including the azimuth, dip and horizontal positions of the transmitter antenna are analytically calculated. We invert for both the navigation parameters of the towed dipole source (including antenna azimuth, dip, and horizontal positions) and seafloor resistivity by using the whole range of data instead of the near-field data (usually source-receiver offset <1 km). An eigenparameter analysis shows that seafloor resistivities and transmitter navigation parameters can be independently resolved, and a better reconstruction can be obtained with multiple frequency data. The inversions of both the synthetical and field data sets indicate that our inversion method can simultaneously reconstruct seafloor resistivity structures and transmitter navigation parameters.

  6. In-flight angular alignment of inertial navigation systems by means of radio aids

    NASA Technical Reports Server (NTRS)

    Tanner, W.

    1972-01-01

    The principles involved in the angular alignment of the inertial reference by nondirectional data from radio aids are developed and compared with conventional methods of alignment such as gyro-compassing and pendulous vertical determination. The specific problem is considered of the space shuttle reentry and a proposed technique for the alignment of the inertial reference system some time before landing. A description is given of the digital simulation of a transponder interrogation system and of its interaction with the inertial navigation system. Data from reentry simulations are used to demonstrate the effectiveness of in-flight inertial system alignment. Concluding remarks refer to other potential applications such as space shuttle orbit insertion and air navigation of conventional aircraft.

  7. Underwater terrain-aided navigation based on multibeam bathymetric sonar images

    NASA Astrophysics Data System (ADS)

    Song, Ziqi; Bian, Hongyu; Zielinski, Adam

    2015-12-01

    Underwater terrain-aided navigation is used to complement traditional inertial navigation employed by autonomous underwater vehicles during lengthy missions. It can provide fixed estimations by matching real-time depth data with a digital terrain map. This study presents the concept of using image processing techniques in the underwater terrain matching process. A traditional gray-scale histogram of an image is enriched by incorporation with spatial information in pixels. Edge corner pixels are then defined and used to construct an edge corner histogram, which it employs as a template to scan the digital terrain map and estimate the fixes of the vehicle by searching the correlation peak. Simulations are performed to investigate the robustness of the proposed method, particularly in relation to its sensitivity to background noise, the scale of real-time images, and the travel direction of the vehicle. At an image resolution of 1 m2/pixel, the accuracy of localization is more than 10 meters.

  8. Development of Terrain Contour Matching Algorithm for the Aided Inertial Navigation Using Radial Basis Functions

    NASA Astrophysics Data System (ADS)

    Gong, Hyeon Cheol

    1998-06-01

    We study on a terrain contour matching algorithm using Radial Basis Functions (RBFs) for aided inertial navigation system for position fixing aircraft, cruise missiles or re-entry vehicles. The parameter optimization technique is used for updating the parameters describing the characteristics of an area with modified Gaussian least square differential correction algorithm and the step size limitation filter according to the amount of updates. We have applied the algorithm for matching a sampled area with a target area supposed that the area data are available from Radar Terrain Sensor (RTS) and Reference Altitude Sensor (RAS).

  9. Flight results from a study of aided inertial navigation applied to landing operations

    NASA Technical Reports Server (NTRS)

    Mcgee, L. A.; Smith, G. L.; Hegarty, D. M.; Carson, T. M.; Merrick, R. B.; Schmidt, S. F.; Conrad, B.

    1973-01-01

    An evaluation is presented of the approach and landing performance of a Kalman filter aided inertial navigation system using flight data obtained from a series of approaches and landings of the CV-340 aircraft at an instrumented test area. A description of the flight test is given, in which data recorded included: (1) accelerometer signals from the platform of an INS; (2) three ranges from the Ames-Cubic Precision Ranging System; and (3) radar and barometric altimeter signals. The method of system evaluation employed was postflight processing of the recorded data using a Kalman filter which was designed for use on the XDS920 computer onboard the CV-340 aircraft. Results shown include comparisons between the trajectories as estimated by the Kalman filter aided system and as determined from cinetheodolite data. Data start initialization of the Kalman filter, operation at a practical data rate, postflight modeling of sensor errors and operation under the adverse condition of bad data are illustrated.

  10. Surgical treatment of distal anterior cerebral artery aneurysms aided by electromagnetic navigation CT angiography.

    PubMed

    Hermann, Elvis J; Petrakakis, Ioannis; Götz, Friedrich; Lütjens, Götz; Lang, Josef; Nakamura, Makoto; Krauss, Joachim K

    2015-07-01

    The surgical treatment of distal anterior cerebral artery (DACA) aneurysms still presents a challenge for neurosurgeons because of their small size and their location in the depth of the narrow frontal interhemispheric fissure. This study aimed to investigate feasibility, safety, accuracy, and usefulness of electromagnetic (EM) navigation to aid clipping of DACA aneurysms. Eight patients (age between 2 and 68 years, mean age 49.8 years) with a DACA aneurysm underwent EM-guided neuronavigated microsurgery for clipping of the aneurysm. All patients underwent craniocervical 3D-CT angiography preoperatively. After planning the optimal approach and surgical trajectory avoiding opening of the frontal sinus, the head was fixed. Intraoperative screenshots were correlated with the microscopical view of the DACA aneurysms before clipping. EM-guided neuronavigation using CT angiography for DACA aneurysms enabled fast and accurate referencing of the patient and planning of a tailored craniotomy without opening of the frontal sinus. Intraoperative accuracy was highly reliable except in one instance due to dislocation of the dynamic reference frame (DRF). There was a good correlation between the 3D-CT angiography-based navigation data sets and the intraoperative vascular anatomy. In all patients, bridging veins were spared. The aid of EM neuronavigation was considered useful in all instances. EM-guided neuronavigation using CT angiography for surgery of DACA aneurysms is a useful tool optimizing the surgical approach directly to the aneurysm minimizing additional damage to the surrounding tissue during preparation of the aneurysm and the parent vessel.

  11. Land Vehicle Navigation with the Integration of GPS and Reduced INS: Performance Improvement with Velocity Aiding

    NASA Astrophysics Data System (ADS)

    Han, Songlai; Wang, Jinling

    The movement of a land vehicle is constrained because the vehicle always remains on the Earth's surface and only experiences small pitch and roll angles. So the GPS/INS integrated system for land vehicle navigation could be reconfigured to be the integration of GPS and reduced INS to cut down the costs. In a reduced INS, the vertical accelerometer and two horizontal gyros could be omitted from the system. But both theoretical analysis and experimental results show that this configuration may result in the divergence of height solution and large velocity errors. To improve the system performances, precise velocity derived from GPS carrier phase measurements, together with the GPS single point positioning solution, is used to aid the reduced INS. Field test results have demonstrated that first, the aiding from GPS precise velocity overcomes the divergence problem of the integrated height solutions and improves the integrated velocity and secondly the proposed novel integration scheme could achieve comparable navigation accuracy with that from the GPS and full INS integrated system.

  12. A depth-based head-mounted visual display to aid navigation in partially sighted individuals.

    PubMed

    Hicks, Stephen L; Wilson, Iain; Muhammed, Louwai; Worsfold, John; Downes, Susan M; Kennard, Christopher

    2013-01-01

    Independent navigation for blind individuals can be extremely difficult due to the inability to recognise and avoid obstacles. Assistive techniques such as white canes, guide dogs, and sensory substitution provide a degree of situational awareness by relying on touch or hearing but as yet there are no techniques that attempt to make use of any residual vision that the individual is likely to retain. Residual vision can restricted to the awareness of the orientation of a light source, and hence any information presented on a wearable display would have to limited and unambiguous. For improved situational awareness, i.e. for the detection of obstacles, displaying the size and position of nearby objects, rather than including finer surface details may be sufficient. To test whether a depth-based display could be used to navigate a small obstacle course, we built a real-time head-mounted display with a depth camera and software to detect the distance to nearby objects. Distance was represented as brightness on a low-resolution display positioned close to the eyes without the benefit focussing optics. A set of sighted participants were monitored as they learned to use this display to navigate the course. All were able to do so, and time and velocity rapidly improved with practise with no increase in the number of collisions. In a second experiment a cohort of severely sight-impaired individuals of varying aetiologies performed a search task using a similar low-resolution head-mounted display. The majority of participants were able to use the display to respond to objects in their central and peripheral fields at a similar rate to sighted controls. We conclude that the skill to use a depth-based display for obstacle avoidance can be rapidly acquired and the simplified nature of the display may appropriate for the development of an aid for sight-impaired individuals.

  13. A Depth-Based Head-Mounted Visual Display to Aid Navigation in Partially Sighted Individuals

    PubMed Central

    Hicks, Stephen L.; Wilson, Iain; Muhammed, Louwai; Worsfold, John; Downes, Susan M.; Kennard, Christopher

    2013-01-01

    Independent navigation for blind individuals can be extremely difficult due to the inability to recognise and avoid obstacles. Assistive techniques such as white canes, guide dogs, and sensory substitution provide a degree of situational awareness by relying on touch or hearing but as yet there are no techniques that attempt to make use of any residual vision that the individual is likely to retain. Residual vision can restricted to the awareness of the orientation of a light source, and hence any information presented on a wearable display would have to limited and unambiguous. For improved situational awareness, i.e. for the detection of obstacles, displaying the size and position of nearby objects, rather than including finer surface details may be sufficient. To test whether a depth-based display could be used to navigate a small obstacle course, we built a real-time head-mounted display with a depth camera and software to detect the distance to nearby objects. Distance was represented as brightness on a low-resolution display positioned close to the eyes without the benefit focussing optics. A set of sighted participants were monitored as they learned to use this display to navigate the course. All were able to do so, and time and velocity rapidly improved with practise with no increase in the number of collisions. In a second experiment a cohort of severely sight-impaired individuals of varying aetiologies performed a search task using a similar low-resolution head-mounted display. The majority of participants were able to use the display to respond to objects in their central and peripheral fields at a similar rate to sighted controls. We conclude that the skill to use a depth-based display for obstacle avoidance can be rapidly acquired and the simplified nature of the display may appropriate for the development of an aid for sight-impaired individuals. PMID:23844067

  14. Design and implementation of a GPS-aided inertial navigation system for a helicopter UAV

    NASA Astrophysics Data System (ADS)

    Kastelan, David R.

    Helicopter unmanned aerial vehicles (UAVs) benefit from vertical takeoff and landing, hover, low-speed, and cruising flight capabilities. This versatility has the expense of nonlinear, unstable, and underactuated system dynamics. These challenges and numerous potential applications make the helicopter UAV an interesting testbed for nonlinear control. A platform for such development has been established in the Applied Nonlinear Controls Lab (ANCL). A miniature helicopter was augmented with a manual/autonomous takeover system and the ANCL Avionics. This payload contains a global positioning system (GPS) receiver, inertial sensors, and communications and computing hardware. Allan variance analysis of inertial sensor data enabled the derivation of a GPS-aided inertial navigation system that was implemented on the ANCL Avionics. This extended Kalman filter (EKF)-based algorithm estimates vehicle position, velocity, and attitude necessary for system identification tasks and control system feedback. Performance validation of this algorithm was demonstrated in simulation and in experimental ground and flight tests.

  15. Extraction method of suitable matching regions in the gravity-aided inertial navigation

    NASA Astrophysics Data System (ADS)

    Yan, Li; Ma, Xudong; Shi, Juan; Shi, Yulong

    2009-10-01

    The data organization of gravitational field is based on a form of Grid, which is similar to the data structure of DEM in the terrain. So this paper proposes a method of gravitational field analysis for extracting features by adopting some spatial analysis means of topography. First of all, the gravity anomaly data is used to calculate the roughness features of gravitational field. after comparing and anglicizing the features, roughness features are selected as the feature factor of gravity. Then, the method of calculating contour lines is applied to calculate region segmentation of roughness features and extract the vector edge of the larger feature regions, and clustering analysis to these contour of the region. At last, the scope line for Convex Hull of the region is calculated by the Convex Hull algorithm, and so as to obtain a more prominent region (matching region) that have significant changes in gravity anomaly, which provide the necessary reference data for the gravity-aided inertial navigation.

  16. An algorithm for terrain-aided inertial navigation based on nonlinear optimal filtering

    NASA Astrophysics Data System (ADS)

    Zhao, Long

    2011-06-01

    When the initial position error or the altimeter measurement noise is large, the BUAA Inertial Terrain-Aided Navigation (BITAN) algorithm based on extended Kalman filtering can not be located accurately. To solve this problem, we propose a modified BITAN algorithm based on nonlinear optimal filtering. The posterior probability density correction is obtained by using the prior probability density of the system's state transition model and the most recent observations. Hence, the local unobservable system caused by the measurement equation through terrain linearization is avoided. This algorithm is tested by using the digital elevation model and flight data, and is compared with BITAN. Results show that the accuracy of the proposed algorithm is higher than BITAN, and the robustness of the system is improved.

  17. 6-DOF Pose Estimation of a Robotic Navigation Aid by Tracking Visual and Geometric Features.

    PubMed

    Ye, Cang; Hong, Soonhac; Tamjidi, Amirhossein

    2015-10-01

    This paper presents a 6-DOF Pose Estimation (PE) method for a Robotic Navigation Aid (RNA) for the visually impaired. The RNA uses a single 3D camera for PE and object detection. The proposed method processes the camera's intensity and range data to estimates the camera's egomotion that is then used by an Extended Kalman Filter (EKF) as the motion model to track a set of visual features for PE. A RANSAC process is employed in the EKF to identify inliers from the visual feature correspondences between two image frames. Only the inliers are used to update the EKF's state. The EKF integrates the egomotion into the camera's pose in the world coordinate system. To retain the EKF's consistency, the distance between the camera and the floor plane (extracted from the range data) is used by the EKF as the observation of the camera's z coordinate. Experimental results demonstrate that the proposed method results in accurate pose estimates for positioning the RNA in indoor environments. Based on the PE method, a wayfinding system is developed for localization of the RNA in a home environment. The system uses the estimated pose and the floorplan to locate the RNA user in the home environment and announces the points of interest and navigational commands to the user through a speech interface.

  18. 3D Object Recognition of a Robotic Navigation Aid for the Visually Impaired.

    PubMed

    Ye, Cang; Qian, Xiangfei

    2017-09-01

    This paper presents a 3D object recognition method and its implementation on a Robotic Navigation Aid (RNA) to allow real-time detection of indoor structural objects for the navigation of a blind person. The method segments a point cloud into numerous planar patches and extracts their Inter-Plane Relationships (IPRs). Based on the existing IPRs of the object models, the method defines 6 High Level Features (HLFs) and determines the HLFs for each patch. A Gaussian-Mixture-Model-based plane classifier is then devised to classify each planar patch into one belonging to a particular object model. Finally, a recursive plane clustering procedure is used to cluster the classified planes into the model objects. As the proposed method uses geometric context to detect an object, it is robust to the object's visual appearance change. As a result, it is ideal for detecting structural objects (e.g., stairways, doorways, etc.). In addition, it has high scalability and parallelism. The method is also capable of detecting some indoor non-structural objects. Experimental results demonstrate that the proposed method has a high success rate in object recognition.

  19. Using Electromagnetic Navigation Bronchoscopy and Dye Injection to Aid in Video-Assisted Lung Resection.

    PubMed

    Brown, Jordan; Lee, Thomas J; Joiner, Theresa; Wrightson, William

    2016-11-01

    Small (2 cm) peripheral lung lesions and ground glass opacities remain a difficult subset of lung lesions for the diagnosis and management of lung cancer. Surgical biopsy is more difficult for these lesions because intraoperative localization has to be made without the aid of direct visualization or manual palpation. Electromagnetic navigation bronchoscopy can be used in the operating room to identify a small peripheral lesion and marked using an injection of methylene blue, which can be seen on the visceral pleura of the lung. We present our initial experience using this technique. The sample was eight patients who had peripheral lesions with an average size of 19 mm. Surgical wedge biopsy was diagnostic in all cases, with an average procedure time of 28 minutes. There were no complications from this procedure. In conclusion, these data suggest that electromagnetic navigation bronchoscopy can be performed safely with high diagnostic accuracy by the operating thoracic surgeon, but further data are needed to establish its utility and safety.

  20. Development of a computer program data base of a navigation aid environment for simulated IFR flight and landing studies

    NASA Technical Reports Server (NTRS)

    Bergeron, H. P.; Haynie, A. T.; Mcdede, J. B.

    1980-01-01

    A general aviation single pilot instrument flight rule simulation capability was developed. Problems experienced by single pilots flying in IFR conditions were investigated. The simulation required a three dimensional spatial navaid environment of a flight navigational area. A computer simulation of all the navigational aids plus 12 selected airports located in the Washington/Norfolk area was developed. All programmed locations in the list were referenced to a Cartesian coordinate system with the origin located at a specified airport's reference point. All navigational aids with their associated frequencies, call letters, locations, and orientations plus runways and true headings are included in the data base. The simulation included a TV displayed out-the-window visual scene of country and suburban terrain and a scaled model runway complex. Any of the programmed runways, with all its associated navaids, can be referenced to a runway on the airport in this visual scene. This allows a simulation of a full mission scenario including breakout and landing.

  1. The Effects of Spatial Visualization Ability and Graphical Navigational Aids on Cognitive Load and Learning from Web-Based Instruction

    ERIC Educational Resources Information Center

    Morozov, Andrew

    2009-01-01

    This study contributes to research investigating the effects of individual differences and online instructional design on learning. Learning performance was compared across three hypertext formats incorporating different navigational aids. The hierarchical map represented the physical structure of the hypertext in one condition, while the network…

  2. Future Interannual Variability of Arctic Sea Ice Area and its Implications for Marine Navigation

    NASA Astrophysics Data System (ADS)

    Vavrus, S. J.; Mioduszewski, J.; Holland, M. M.; Wang, M.; Landrum, L.

    2016-12-01

    As both a symbol and driver of ongoing climate change, the diminishing Arctic sea ice pack has been widely studied in a variety of contexts. Most research, however, has focused on time-mean changes in sea ice, rather than on short-term variations that also have important physical and societal consequences. In this study we test the hypothesis that interannual Arctic sea ice variability will increase in the future by utilizing a set of 40 independent simulations from the Community Earth System Model's Large Ensemble for the 1920-2100 period. The model projects that ice variability will indeed grow substantially in all months but with a strong seasonal dependence in magnitude and timing. The variability increases most during late autumn (November-December) and least during spring. This increase proceeds in a time-transgressive manner over the course of the year, peaking soonest (2020s) in late-summer months and latest (2090s) during late spring. The variability in every month is inversely correlated with the average melt rate, resulting in an eventual decline in both terms as the ice pack becomes seasonal by late century. These projected changes in sea ice variations will likely have significant consequences for marine navigation, which we assess with the empirical Ice Numeral (IN) metric. A function of ice concentration and thickness, the IN quantifies the difficulty in traversing a transect of sea ice-covered ocean as a function of vessel strength. Our results show that although increasingly open Arctic seas will mean generally more favorable conditions for navigation, the concurrent rise in the variability of ice cover poses a competing risk. In particular, future intervals featuring the most rapid declines in ice area that coincide with the highest interannual ice variations will offer more inviting shipping opportunities tempered by less predictable navigational conditions.

  3. 6-DOF Pose Estimation of a Robotic Navigation Aid by Tracking Visual and Geometric Features

    PubMed Central

    Ye, Cang; Hong, Soonhac; Tamjidi, Amirhossein

    2015-01-01

    This paper presents a 6-DOF Pose Estimation (PE) method for a Robotic Navigation Aid (RNA) for the visually impaired. The RNA uses a single 3D camera for PE and object detection. The proposed method processes the camera’s intensity and range data to estimates the camera’s egomotion that is then used by an Extended Kalman Filter (EKF) as the motion model to track a set of visual features for PE. A RANSAC process is employed in the EKF to identify inliers from the visual feature correspondences between two image frames. Only the inliers are used to update the EKF’s state. The EKF integrates the egomotion into the camera’s pose in the world coordinate system. To retain the EKF’s consistency, the distance between the camera and the floor plane (extracted from the range data) is used by the EKF as the observation of the camera’s z coordinate. Experimental results demonstrate that the proposed method results in accurate pose estimates for positioning the RNA in indoor environments. Based on the PE method, a wayfinding system is developed for localization of the RNA in a home environment. The system uses the estimated pose and the floorplan to locate the RNA user in the home environment and announces the points of interest and navigational commands to the user through a speech interface. Note to Practitioners This work was motivated by the limitations of the existing navigation technology for the visually impaired. Most of the existing methods use a point/line measurement sensor for indoor object detection. Therefore, they lack capability in detecting 3D objects and positioning a blind traveler. Stereovision has been used in recent research. However, it cannot provide reliable depth data for object detection. Also, it tends to produce a lower localization accuracy because its depth measurement error quadratically increases with the true distance. This paper suggests a new approach for navigating a blind traveler. The method uses a single 3D time

  4. Using APEX to Model Anticipated Human Error: Analysis of a GPS Navigational Aid

    NASA Technical Reports Server (NTRS)

    VanSelst, Mark; Freed, Michael; Shefto, Michael (Technical Monitor)

    1997-01-01

    The interface development process can be dramatically improved by predicting design facilitated human error at an early stage in the design process. The approach we advocate is to SIMULATE the behavior of a human agent carrying out tasks with a well-specified user interface, ANALYZE the simulation for instances of human error, and then REFINE the interface or protocol to minimize predicted error. This approach, incorporated into the APEX modeling architecture, differs from past approaches to human simulation in Its emphasis on error rather than e.g. learning rate or speed of response. The APEX model consists of two major components: (1) a powerful action selection component capable of simulating behavior in complex, multiple-task environments; and (2) a resource architecture which constrains cognitive, perceptual, and motor capabilities to within empirically demonstrated limits. The model mimics human errors arising from interactions between limited human resources and elements of the computer interface whose design falls to anticipate those limits. We analyze the design of a hand-held Global Positioning System (GPS) device used for radical and navigational decisions in small yacht recalls. The analysis demonstrates how human system modeling can be an effective design aid, helping to accelerate the process of refining a product (or procedure).

  5. Using APEX to Model Anticipated Human Error: Analysis of a GPS Navigational Aid

    NASA Technical Reports Server (NTRS)

    VanSelst, Mark; Freed, Michael; Shefto, Michael (Technical Monitor)

    1997-01-01

    The interface development process can be dramatically improved by predicting design facilitated human error at an early stage in the design process. The approach we advocate is to SIMULATE the behavior of a human agent carrying out tasks with a well-specified user interface, ANALYZE the simulation for instances of human error, and then REFINE the interface or protocol to minimize predicted error. This approach, incorporated into the APEX modeling architecture, differs from past approaches to human simulation in Its emphasis on error rather than e.g. learning rate or speed of response. The APEX model consists of two major components: (1) a powerful action selection component capable of simulating behavior in complex, multiple-task environments; and (2) a resource architecture which constrains cognitive, perceptual, and motor capabilities to within empirically demonstrated limits. The model mimics human errors arising from interactions between limited human resources and elements of the computer interface whose design falls to anticipate those limits. We analyze the design of a hand-held Global Positioning System (GPS) device used for radical and navigational decisions in small yacht recalls. The analysis demonstrates how human system modeling can be an effective design aid, helping to accelerate the process of refining a product (or procedure).

  6. On the use of SAR interferometry to aid navigation of UAV

    NASA Astrophysics Data System (ADS)

    Nitti, Davide O.; Bovenga, Fabio; Morea, Alberto; Rana, Fabio M.; Guerriero, Luciano; Greco, Mario; Pinelli, Gianpaolo

    2012-09-01

    This study is aimed at exploring the potentials of SAR Interferometry (InSAR) to aid Unmanned Aerial Vehicles (UAV) navigation. The basic idea is to infer both position and attitude of an aerial platform by inspecting the InSAR phase derived by a real time SAR interferometer mounted onboard the platform. Thanks to the expected favorable conditions in terms of geometrical sensitivity as well as signal coherence, the InSAR phase field can be used to derive the terrain elevation. By using both approximated position and attitude values of the platform as well as a reference Digital Terrain Model (DTM) from a mission database available onboard, it is possible to generate a synthetic InSAR phase model to be compared w.r.t. that derived by SAR observations. The geometrical transformation needed to match these two terrain models depends on the difference between position and attitude values derived by the instruments available on board and their actual values. Hence, this matching provides a feedback to be used for adjusting position and attitude. In order to assess the reliability of the proposed approach, we evaluated the interferometric sensitivity to changes in position and attitude. This analysis defines the limits of applicability of the InSAR-based approach and provides indications and requirements on geometric and radiometric parameters.

  7. All source adaptive fusion for aided navigation in non-GPS environment

    NASA Astrophysics Data System (ADS)

    Aboutalib, Omar; Awalt, Bruce; Fung, Alex; Thai, Bea; Leibs, Jeremy; Klausutis, Timothy J.; Wehling, Ric; Iames, Matthew

    2007-04-01

    An innovative approach for navigation in non-GPS environment is presented based on all source adaptive fusion of any available information encompassing passive imaging data, digital elevation terrain data, IMU/GPS, altimeters, and star tracker. The approach provides continuous navigation through non-GPS environment and yields an improved navigation in the presence of GPS. The approach also provides reduced target location error and moving target indication.

  8. Current Methods for Meteorological and Marine Forecasting for the Assistance of Navigation and Shipping Operations

    NASA Astrophysics Data System (ADS)

    Del Prete, R.; Pezzoli, A.; Pezzoli, G.

    The objective of this paper is to illustrate a methodology for the enhancement of meteorological marine forecasts tailored to the needs of navigation. The study consists of two parts: (1) Theoretical background. Introduction to numerical models for weather forecasting used by meteorological centres. A review of the most reliable equations for prediction of intensity and direction of wind and sea state. In particular, reference is made to the tables for wind forecasting developed by R. Mayençon and A. Pezzoli and the equations for prediction of sea state obtained by K. Haselman and D. J. T. Carter in light of the JONSWAP experiment. (2) Practical application. Application of the methodology to a real-world example: a weather forecast elaborated by the Meteohydrological Laboratory at Dipartimento d'Idraulica Trasporti ed Infrastrutture Civili (DITIC) of the Polytechnic of Turin. The forecast was requested by the Consorzio Prada Challenge 2000 as a meteorological support for the training they held in the Tyrrhenian Sea for the next America's Cup series.

  9. APPLICATION OF COMPUTER-AIDED TOMOGRAPHY TO VISUALIZE AND QUANTIFY BIOGENIC STRUCTURES IN MARINE SEDIMENTS

    EPA Science Inventory

    We used computer-aided tomography (CT) for 3D visualization and 2D analysis of

    marine sediment cores from 3 stations (at 10, 75 and 118 m depths) with different environmental

    impact. Biogenic structures such as tubes and burrows were quantified and compared among st...

  10. The Power of Computer-aided Tomography to Investigate Marine Benthic Communities

    EPA Science Inventory

    Utilization of Computer-aided-Tomography (CT) technology is a powerful tool to investigate benthic communities in aquatic systems. In this presentation, we will attempt to summarize our 15 years of experience in developing specific CT methods and applications to marine benthic co...

  11. APPLICATION OF COMPUTER-AIDED TOMOGRAPHY TO VISUALIZE AND QUANTIFY BIOGENIC STRUCTURES IN MARINE SEDIMENTS

    EPA Science Inventory

    We used computer-aided tomography (CT) for 3D visualization and 2D analysis of

    marine sediment cores from 3 stations (at 10, 75 and 118 m depths) with different environmental

    impact. Biogenic structures such as tubes and burrows were quantified and compared among st...

  12. The Power of Computer-aided Tomography to Investigate Marine Benthic Communities

    EPA Science Inventory

    Utilization of Computer-aided-Tomography (CT) technology is a powerful tool to investigate benthic communities in aquatic systems. In this presentation, we will attempt to summarize our 15 years of experience in developing specific CT methods and applications to marine benthic co...

  13. Computer simulation program for parallel SITAN. [Sandia Inertia Terrain-Aided Navigation, in FORTRAN

    SciTech Connect

    Andreas, R.D.; Sheives, T.C.

    1980-11-01

    This computer program simulates the operation of parallel SITAN using digitized terrain data. An actual trajectory is modeled including the effects of inertial navigation errors and radar altimeter measurements.

  14. Enhanced Image-Aided Navigation Algorithm with Automatic Calibration and Affine Distortion Prediction

    DTIC Science & Technology

    2012-03-01

    frame, but it does accelerate with respect to the true inertial frame due to the relative rotation between celestial bodies . However, for terrestrial...Earth, and vehicle-fixed navigation frame. . . . . . . . 9 2.2 Earth-fixed navigation frame. . . . . . . . . . . . . . . . . . . . 10 2.3 Aircraft body ...distorted image with new SIFT features. . . . . . 65 3.12 Sample nearest neighbor feature match. . . . . . . . . . . . . . 66 3.13 Nature of visual

  15. Vision-Aided Context-Aware Framework for Personal Navigation Services

    NASA Astrophysics Data System (ADS)

    Saeedi, S.; Moussa, A.; El-Sheimy, N., , Dr.

    2012-07-01

    The ubiquity of mobile devices (such as smartphones and tablet-PCs) has encouraged the use of location-based services (LBS) that are relevant to the current location and context of a mobile user. The main challenge of LBS is to find a pervasive and accurate personal navigation system (PNS) in different situations of a mobile user. In this paper, we propose a method of personal navigation for pedestrians that allows a user to freely move in outdoor environments. This system aims at detection of the context information which is useful for improving personal navigation. The context information for a PNS consists of user activity modes (e.g. walking, stationary, driving, and etc.) and the mobile device orientation and placement with respect to the user. After detecting the context information, a low-cost integrated positioning algorithm has been employed to estimate pedestrian navigation parameters. The method is based on the integration of the relative user's motion (changes of velocity and heading angle) estimation based on the video image matching and absolute position information provided by GPS. A Kalman filter (KF) has been used to improve the navigation solution when the user is walking and the phone is in his/her hand. The Experimental results demonstrate the capabilities of this method for outdoor personal navigation systems.

  16. An Investigation of the Relative Safety of Alternative Navigational System Designs for the New Sunshine Skyway Bridge: A CAORF (Computer Aided Operations Research Facility) Simulation.

    DTIC Science & Technology

    1985-09-01

    characteristics. Pilots were required to provided no added margin of safety beyond the bridge - use greater crab angles during thunderstorm scenarios...electronic navigation aids may would combine dolphins, complete island and horseshoe . "provide significantly improved navigational data" to island stuctures...The next two bridge piers on should not be so close to bridges that the success of navigat- either side would be protected by a horseshoe shaped ing

  17. Users' Evaluations of Four Electronic Travel Aids Aimed at Navigation for Persons Who Are Visually Impaired

    ERIC Educational Resources Information Center

    Roentgen, Uta R.; Gelderblom, Gert Jan; de Witte, Luc P.

    2011-01-01

    Eighteen persons with visual impairments evaluated four systematically selected navigation systems. Their performance on 11 tasks, provided ratings, satisfaction on seven aspects of the assistive devices, and explanatory comments show generally valuable functionality and usability, as well as individual marked preferences for various features of…

  18. Narrowing the College Opportunity Gap: Helping Students and Families Navigate the Financial Aid Process

    ERIC Educational Resources Information Center

    Owen, Laura

    2012-01-01

    The number of students enrolling in post-secondary institutions in the U.S. has slowly been rising over the last 10 years, yet gaps continue to exist in terms of who attends college and persists through graduation. Minority and low income students often lack the guidance needed to navigate the college enrollment process and as a result, remain…

  19. Navigation Aiding by a Hybrid Laser-Camera Motion Estimator for Micro Aerial Vehicles

    PubMed Central

    Atman, Jamal; Popp, Manuel; Ruppelt, Jan; Trommer, Gert F.

    2016-01-01

    Micro Air Vehicles (MAVs) equipped with various sensors are able to carry out autonomous flights. However, the self-localization of autonomous agents is mostly dependent on Global Navigation Satellite Systems (GNSS). In order to provide an accurate navigation solution in absence of GNSS signals, this article presents a hybrid sensor. The hybrid sensor is a deep integration of a monocular camera and a 2D laser rangefinder so that the motion of the MAV is estimated. This realization is expected to be more flexible in terms of environments compared to laser-scan-matching approaches. The estimated ego-motion is then integrated in the MAV’s navigation system. However, first, the knowledge about the pose between both sensors is obtained by proposing an improved calibration method. For both calibration and ego-motion estimation, 3D-to-2D correspondences are used and the Perspective-3-Point (P3P) problem is solved. Moreover, the covariance estimation of the relative motion is presented. The experiments show very accurate calibration and navigation results. PMID:27649203

  20. Navigation Aiding by a Hybrid Laser-Camera Motion Estimator for Micro Aerial Vehicles.

    PubMed

    Atman, Jamal; Popp, Manuel; Ruppelt, Jan; Trommer, Gert F

    2016-09-16

    Micro Air Vehicles (MAVs) equipped with various sensors are able to carry out autonomous flights. However, the self-localization of autonomous agents is mostly dependent on Global Navigation Satellite Systems (GNSS). In order to provide an accurate navigation solution in absence of GNSS signals, this article presents a hybrid sensor. The hybrid sensor is a deep integration of a monocular camera and a 2D laser rangefinder so that the motion of the MAV is estimated. This realization is expected to be more flexible in terms of environments compared to laser-scan-matching approaches. The estimated ego-motion is then integrated in the MAV's navigation system. However, first, the knowledge about the pose between both sensors is obtained by proposing an improved calibration method. For both calibration and ego-motion estimation, 3D-to-2D correspondences are used and the Perspective-3-Point (P3P) problem is solved. Moreover, the covariance estimation of the relative motion is presented. The experiments show very accurate calibration and navigation results.

  1. Users' Evaluations of Four Electronic Travel Aids Aimed at Navigation for Persons Who Are Visually Impaired

    ERIC Educational Resources Information Center

    Roentgen, Uta R.; Gelderblom, Gert Jan; de Witte, Luc P.

    2011-01-01

    Eighteen persons with visual impairments evaluated four systematically selected navigation systems. Their performance on 11 tasks, provided ratings, satisfaction on seven aspects of the assistive devices, and explanatory comments show generally valuable functionality and usability, as well as individual marked preferences for various features of…

  2. Ionospheric electron density inversion for Global Navigation Satellite Systems radio occultation using aided Abel inversions

    NASA Astrophysics Data System (ADS)

    Chou, Min Yang; Lin, Charles C. H.; Tsai, Ho Fang; Lin, Chi Yen

    2017-01-01

    The Abel inversion of ionospheric electron density profiles with the assumption of spherical symmetry applied for radio occultation soundings could introduce a greater systematic error or sometimes artifacts if the occultation rays trespass regions with larger horizontal gradients in electron density. The aided Abel inversions have been proposed by considering the asymmetry ratio derived from ionospheric total electron content (TEC) or peak density (NmF2) of reconstructed observation maps since knowledge of the horizontal asymmetry in ambient ionospheric density could mitigate the inversion error. Here we propose a new aided Abel inversion using three-dimensional time-dependent electron density (Ne) based on the climatological maps constructed from previous observations, as it has an advantage of providing altitudinal information on the horizontal asymmetry. Improvement of proposed Ne-aided Abel inversion and comparisons with electron density profiles inverted from the NmF2- and TEC-aided inversions are studied using observation system simulation experiments. Comparison results show that all three aided Abel inversions improve the ionospheric profiling by mitigating the artificial plasma caves and negative electron density in the daytime E region. The equatorial ionization anomaly crests in the F region become more distinct. The statistical results show that the Ne-aided Abel inversion has less mean and RMS error of error percentage above 250 km altitudes, and the performances for all aided Abel inversions are similar below 250 km altitudes.

  3. LIDAR-Aided Inertial Navigation with Extended Kalman Filtering for Pinpoint Landing

    NASA Technical Reports Server (NTRS)

    Busnardo, David M.; Aitken, Matthew L.; Tolson, Robert H.; Pierrottet, Diego; Amzajerdian, Farzin

    2011-01-01

    In support of NASA s Autonomous Landing and Hazard Avoidance Technology (ALHAT) project, an extended Kalman filter routine has been developed for estimating the position, velocity, and attitude of a spacecraft during the landing phase of a planetary mission. The proposed filter combines measurements of acceleration and angular velocity from an inertial measurement unit (IMU) with range and Doppler velocity observations from an onboard light detection and ranging (LIDAR) system. These high-precision LIDAR measurements of distance to the ground and approach velocity will enable both robotic and manned vehicles to land safely and precisely at scientifically interesting sites. The filter has been extensively tested using a lunar landing simulation and shown to improve navigation over flat surfaces or rough terrain. Experimental results from a helicopter flight test performed at NASA Dryden in August 2008 demonstrate that LIDAR can be employed to significantly improve navigation based exclusively on IMU integration.

  4. Feature and Pose Constrained Visual Aided Inertial Navigation for Computationally Constrained Aerial Vehicles

    NASA Technical Reports Server (NTRS)

    Williams, Brian; Hudson, Nicolas; Tweddle, Brent; Brockers, Roland; Matthies, Larry

    2011-01-01

    A Feature and Pose Constrained Extended Kalman Filter (FPC-EKF) is developed for highly dynamic computationally constrained micro aerial vehicles. Vehicle localization is achieved using only a low performance inertial measurement unit and a single camera. The FPC-EKF framework augments the vehicle's state with both previous vehicle poses and critical environmental features, including vertical edges. This filter framework efficiently incorporates measurements from hundreds of opportunistic visual features to constrain the motion estimate, while allowing navigating and sustained tracking with respect to a few persistent features. In addition, vertical features in the environment are opportunistically used to provide global attitude references. Accurate pose estimation is demonstrated on a sequence including fast traversing, where visual features enter and exit the field-of-view quickly, as well as hover and ingress maneuvers where drift free navigation is achieved with respect to the environment.

  5. A Navigation Reference System (NRS) Using Global Positioning System (GPS) Aiding

    DTIC Science & Technology

    1991-03-01

    forever. inii Tom Cox, Ken Crosby, Roger Evans, Tom Flynn, Maurice Martin, Russ Miller, Rob Moyle, Barbara Niblett, Paul Rohs, Dan Sims, Jack Taylor...from [31]. A good error model for the GPS error sources Is extracted from separate articles by Cox [6], Martin [21], and Milliken and Zoller [27] and...navigation solution, However, Milliken and Zoller also state that fewev SVs are needed If the user has other information (such as baro-altimeter measure- ments

  6. Pectoral fins aid in navigation of a complex environment by bluegill sunfish under sensory deprivation conditions.

    PubMed

    Flammang, Brooke E; Lauder, George V

    2013-08-15

    Complex structured environments offer fish advantages as places of refuge and areas of greater potential prey densities, but maneuvering through these environments is a navigational challenge. To successfully navigate complex habitats, fish must have sensory input relaying information about the proximity and size of obstacles. We investigated the role of the pectoral fins as mechanosensors in bluegill sunfish swimming through obstacle courses under different sensory deprivation and flow speed conditions. Sensory deprivation was accomplished by filming in the dark to remove visual input and/or temporarily blocking lateral line input via immersion in cobalt chloride. Fish used their pectoral fins to touch obstacles as they swam slowly past them under all conditions. Loss of visual and/or lateral line sensory input resulted in an increased number of fin taps and shorter tap durations while traversing the course. Propulsive pectoral fin strokes were made in open areas between obstacle posts and fish did not use the pectoral fins to push off or change heading. Bending of the flexible pectoral fin rays may initiate an afferent sensory input, which could be an important part of the proprioceptive feedback system needed to navigate complex environments. This behavioral evidence suggests that it is possible for unspecialized pectoral fins to act in both a sensory and a propulsive capacity.

  7. Developing detailed a priori 3D models of large environments to aid in robotic navigation tasks

    NASA Astrophysics Data System (ADS)

    Grinstead, Brad; Koschan, Andreas F.; Abidi, Mongi A.

    2004-09-01

    In order to effectively navigate any environment, a robotic vehicle needs to understand the terrain and obstacles native to that environment. Knowledge of its own location and orientation, and knowledge of the region of operation, can greatly improve the robot"s performance. To this end, we have developed a mobile system for the fast digitization of large-scale environments to develop the a priori information needed for prediction and optimization of the robot"s performance. The system collects ground-level video and laser range information, fusing them together to develop accurate 3D models of the target environment. In addition, the system carries a differential Global Positioning System (GPS) as well as an Inertial Navigation System (INS) for determining the position and orientation of the various scanners as they acquire data. Issues involved in the fusion of these various data modalities include: Integration of the position and orientation (pose) sensors" data at varying sampling rates and availability; Selection of "best" geometry in overlapping data cases; Efficient representation of large 3D datasets for real-time processing techniques. Once the models have been created, this data can be used to provide a priori information about negative obstacles, obstructed fields of view, navigation constraints, and focused feature detection.

  8. Computer program for design and performance analysis of navigation-aid power systems. Program documentation. Volume 1: Software requirements document

    NASA Technical Reports Server (NTRS)

    Goltz, G.; Kaiser, L. M.; Weiner, H.

    1977-01-01

    A computer program has been developed for designing and analyzing the performance of solar array/battery power systems for the U.S. Coast Guard Navigational Aids. This program is called the Design Synthesis/Performance Analysis (DSPA) Computer Program. The basic function of the Design Synthesis portion of the DSPA program is to evaluate functional and economic criteria to provide specifications for viable solar array/battery power systems. The basic function of the Performance Analysis portion of the DSPA program is to simulate the operation of solar array/battery power systems under specific loads and environmental conditions. This document establishes the software requirements for the DSPA computer program, discusses the processing that occurs within the program, and defines the necessary interfaces for operation.

  9. Computer program for design and performance analysis of navigation-aid power systems. Program documentation. Volume 1: Software requirements document

    NASA Technical Reports Server (NTRS)

    Goltz, G.; Kaiser, L. M.; Weiner, H.

    1977-01-01

    A computer program has been developed for designing and analyzing the performance of solar array/battery power systems for the U.S. Coast Guard Navigational Aids. This program is called the Design Synthesis/Performance Analysis (DSPA) Computer Program. The basic function of the Design Synthesis portion of the DSPA program is to evaluate functional and economic criteria to provide specifications for viable solar array/battery power systems. The basic function of the Performance Analysis portion of the DSPA program is to simulate the operation of solar array/battery power systems under specific loads and environmental conditions. This document establishes the software requirements for the DSPA computer program, discusses the processing that occurs within the program, and defines the necessary interfaces for operation.

  10. Integrated INS/GPS/GLONASS navigation aid for manned space flight

    NASA Technical Reports Server (NTRS)

    Anderman, Alfred

    1991-01-01

    While both the U.S. Navstar GPS and the Soviet GLONASS will furnish users consistent global coverage for position fixes, neither system is certifiable as a sole-source navigation system because not enough of its satellites will be in view of vehicular receivers at one time to satisfy the redundancy and system-monitoring standards of the FAA and ICAO. A hybrid receiver employing combined signals from both satellite fleets will overcome this problem. While recent test flight results confirm the feasibility of precision landing approaches conducted by these means, issues bearing on calibration, standardization, and organization remain to be resolved politically and diplomatically.

  11. Loosely Coupled GPS-Aided Inertial Navigation System for Range Safety

    NASA Technical Reports Server (NTRS)

    Heatwole, Scott; Lanzi, Raymond J.

    2010-01-01

    The Autonomous Flight Safety System (AFSS) aims to replace the human element of range safety operations, as well as reduce reliance on expensive, downrange assets for launches of expendable launch vehicles (ELVs). The system consists of multiple navigation sensors and flight computers that provide a highly reliable platform. It is designed to ensure that single-event failures in a flight computer or sensor will not bring down the whole system. The flight computer uses a rules-based structure derived from range safety requirements to make decisions whether or not to destroy the rocket.

  12. 75 FR 997 - Record of Decision (ROD) on the U.S. Coast Guard Long Range Aids to Navigation (Loran-C) Program

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-07

    ... SECURITY Coast Guard Record of Decision (ROD) on the U.S. Coast Guard Long Range Aids to Navigation (Loran-C) Program AGENCY: Coast Guard, DHS. ACTION: Notice of availability. SUMMARY: The Department of Homeland Security (DHS), United States Coast Guard (USCG), announces the availability of the Record of...

  13. Testing of Solar Photovoltaic Arrays for Utilization on Marine Aids to Navigation,

    DTIC Science & Technology

    1980-11-01

    Coating Thickness Change FIGURE 11. BREAKDOWN OF DEGRADATION FACTORS CONTRIBUTING TO OPTICAL LOSSES WHICH CAUSE A DECREASE IN THE LIGHT-GENERATED...Factors Contriouting to Optical Losses Which Cause a Decrease in the Light-Generated Current 16 12 Degradation Changes Manifest as Series Resistance...Array (figure 1) - In this array, the sealant forms both the cover surface of the panel and the pottant between cells. The thick substrate provides the

  14. Evaluation of Solar Photovoltaic Arrays for Use on Marine Aids to Navigation.

    DTIC Science & Technology

    1979-03-30

    Alaska, Florida, and Massachusetts; field deployment on buoys in Long Island Sound ; and initial development of a screening test to evaluate performance in a short time frame. The results of these tests are presented. (Author)

  15. Performance of the square root information filter for navigation of the Mariner 10 spacecraft

    NASA Technical Reports Server (NTRS)

    Christensen, C. S.

    1976-01-01

    The use is described of a sequential least squares filter in the orbit determination for the Mariner Venus-Mercury (Mariner 10) spacecraft. The orbit determination strategy outlining the use of both the sequential filter and a conventional batch filter is given. Highlighted are the mission events from launch to the first Mercury encounter with emphasis on the sequential filter performance. Advantages to the mission derived from the sequential filter are pointed out.

  16. IEEE PLANS '90 - Position Location and Navigation Symposium, Las Vegas, NV, Mar. 20-23, 1990, Record

    NASA Astrophysics Data System (ADS)

    Various papers on position, location, and navigation are presented. The general topics addressed include: space-based navigation systems; inertial sensor development; other radio navigation system technologies; surveying, mapping, and digital electronics technology; positioning, pointing, and stabilization of space systems; inertial systems development and applications; integrated communicaiton/navigration systems and standard avionics; application of statistical filtering to navigation technology; GPS applications and equipment in civil, governmental, and commercial areas. Also discussed are: integrated navigation and targeting systems; civil aviation and marine navigation/traffic control; geodesy, gravity measurement, and earth reference systems; GPS military applications and equipment; integrated aircraft navigation and flight control; land vehicle navigation, positioning, and information systems; differential GPS; GPS/inertial navigation; terrain aided air vehicle navigation.

  17. Differential NAVSTAR GPS (Global Positioning System) Design Concept for Harbor/Harbor Entrance Marine Navigation.

    DTIC Science & Technology

    1984-05-01

    AD-A141 665 DIFFERENTIAL NAYSTAR GPS ( GLOBAL POSIT [ONING SYSTEM ) / DESIGN CONCEPT FOR H..(U) TRANSPORTATION SYSTEMS CENTER 7 ’ CAMBRIDGE MA J VILCANS...5-3 viii 1. INTRODUCTION 1.1 BACKGROUND The NAVSTAR Global Positioning System ( GPS ) is a satellite... system which will provide global continuous navigation and position location service when it becomes operational. The NAVSTAR GPS program has been in

  18. Navigation Aids for Climate Scientists in an Age of High Stakes Policy Debate

    NASA Astrophysics Data System (ADS)

    Grifo, F.; Ekwurzel, B.; Freeman, J.; Halpern, M.

    2010-12-01

    What is the best way to manage research, data, model output, and email exchanges with colleagues so that they can stand up to public scrutiny? Currently there is little agreement on the dividing line between legitimate requests for sharing scientific information and repetitive and exhaustive demands for data and research products. There is a continuum from raw data to derived products ahead of their publication, or for unpublished interim products and few guidelines for scientists to navigate this terrain. Recent structured interviews with 31 climate scientists by the Union of Concerned Scientists have revealed the widespread nature and toll this lack of clarity exacts as well as the vulnerability of climate scientists and their institutions to attack. In addition, these researchers have provided insights and suggestions for future best practices when under fire. It is time for those funding and managing research, as well as the scientific societies who represent them, to develop discipline specific guidance and tools for scientists to turn to both in times of crisis and as a means to keep the public fully informed and engaged in climate science and its progress. If done well, this can pave a road for ongoing analysis by future researchers as they address future challenges.

  19. Hearing the way: requirements and preferences for technology-supported navigation aids.

    PubMed

    Lewis, Laura; Sharples, Sarah; Chandler, Ed; Worsfold, John

    2015-05-01

    Many systems have been developed to assist wayfinding for people with sight problems. There is a need for user requirements for such systems to be defined. This paper presents a study which aimed to determine such user requirements. An experiment was also conducted to establish the best way of guiding users between locations. The focus group results indicated that users require systems to provide them with information about their surroundings, to guide them along their route and to provide progress information. They also showed that users with sight conditions interact with systems differently to sighted users, thereby highlighting the importance of designing systems for the needs of these users. Results of the experiment found that the preferred method of guiding users was a notification when they were both on and off track. However, performance was best when only provided with the off track notification, implying that this cue is particularly important. Technology has the potential to support navigation for people with sight problems. Users should have control over cues provided and for these cues should supplement environmental cues rather than replacing them. Copyright © 2015. Published by Elsevier Ltd.

  20. Decision-Aiding and Optimization for Vertical Navigation of Long-Haul Aircraft

    NASA Technical Reports Server (NTRS)

    Patrick, Nicholas J. M.; Sheridan, Thomas B.

    1996-01-01

    different airspace design and air traffic management policies. A decision aid is proposed which would combine the pilot's notion of optimality with the GA-based optimization, provide the pilot with a number of alternative pareto-optimal trajectories, and allow him to consider unmodelled attributes and constraints in choosing among them. A solution to the problem of displaying alternatives in a multi-attribute decision space is also presented.

  1. Decision-Aiding and Optimization for Vertical Navigation of Long-Haul Aircraft

    NASA Technical Reports Server (NTRS)

    Patrick, Nicholas J. M.; Sheridan, Thomas B.

    1996-01-01

    different airspace design and air traffic management policies. A decision aid is proposed which would combine the pilot's notion of optimility with the GA-based optimization, provide the pilot with a number of alternative pareto-optimal trajectories, and allow him to consider un-modelled attributes and constraints in choosing among them. A solution to the problem of displaying alternatives in a multi-attribute decision space is also presented.

  2. Coastal Navigation Portfolio Management

    DTIC Science & Technology

    2015-02-19

    CIRP.aspx Coastal Inlets Research Program Coastal Navigation Portfolio Management The Coastal Navigatoin Portfolio Management work unit...across the vast coastal navigation portfolio of projects. The USACE maintains a vast infrastructure portfolio of deep-draft coastal entrance...the Corps needs to be able to direct resources at the navigation projects that are most critical to overall marine transportation system performance

  3. Comparing the effect of a decision aid plus patient navigation with usual care on colorectal cancer screening completion in vulnerable populations: study protocol for a randomized controlled trial

    PubMed Central

    2014-01-01

    Background Screening can reduce colorectal cancer (CRC) incidence and mortality. However, screening is underutilized in vulnerable patient populations, particularly among Latinos. Patient-directed decision aids can increase CRC screening knowledge, self-efficacy, and intent; however, their effect on actual screening test completion tends to be modest. This is probably because decision aids do not address some of the patient-specific barriers that prevent successful completion of CRC screening in these populations. These individual barriers might be addressed though patient navigation interventions. This study will test a combined decision aid and patient navigator intervention on screening completion in diverse populations of vulnerable primary care patients. Methods/Design We will conduct a multisite, randomized controlled trial with patient-level randomization. Planned enrollment is 300 patients aged 50 to 75 years at average CRC risk presenting for appointments at two primary clinics in North Carolina and New Mexico. Intervention participants will view a video decision aid immediately before the clinic visit. The 14 to 16 minute video presents information about fecal occult blood tests and colonoscopy and will be viewed on a portable computer tablet in English or Spanish. Clinic-based patient navigators are bilingual and bicultural and will provide both face-to-face and telephone-based navigation. Control participants will view an unrelated food safety video and receive usual care. The primary outcome is completion of a CRC screening test at six months. Planned subgroup analyses include examining intervention effectiveness in Latinos, who will be oversampled. Secondarily, the trial will evaluate the intervention effects on knowledge of CRC screening, self-efficacy, intent, and patient-provider communication. The study will also examine whether patient ethnicity, acculturation, language preference, or health insurance status moderate the intervention effect on

  4. Marine geodesy a multipurpose approach to solve oceanic problems. [including submersible navigation under iced seas, demarcation and determination of boundaries in deep ocean, tsunamis, and ecology

    NASA Technical Reports Server (NTRS)

    Saxena, N.

    1974-01-01

    Various current and future problem areas of marine geodesy are identified. These oceanic problem areas are highly diversified and include submersible navigation under ice seas, demarcation and determination of boundaries in deep ocean, tsunamis, ecology, etc., etc. Their achieved as well as desired positional accuracy estimates, based upon publications and discussions, are also given. A multipurpose approach to solve these problems is described. An optimum configuration of an ocean-bottom control-net unit is provided.

  5. Hydroflotation magnetic-aided endolumenal navigation-preliminary platform in ex-vivo setting for the next paradigm in minimally invasive urologic surgery.

    PubMed

    Kommu, Sashi S

    2010-07-01

    Navigation of endolumenal devices, such as image rendering capsules, have been described for diagnostic purposes in the animal, and more recently, human models. In urology, the ureter is a prime lumenal structure that often needs to be explored for diagnostic and therapeutic purposes. A novel device using a flotation mechanism in a water-filled environment was developed and its navigation achieved with magnetic-aided guidance. The device was tested for propulsion and real-time control in the ex-vivo setting. An endolumenal bionic worm (EBW) with a magnetic core was developed and introduced into synthetic lumens (SL) and supermarket chicken lumenal structures. The latter involved the gastrointestinal lumenal tissue of supermarket chickens; ie, the ex-vivo equivalent of a ureteral substitute lumen (USL). Navigation was graded by achievement of the EBW in propulsion to premarked sites, ability to remain static when necessary, and trauma to the USL. The structures were observed under the microscope for breech after the exercises. Navigation was observed in 10 SLs and 10 USLs. The EBW was successfully steered using the magnetic guidance system with hydroflotation. Observation of endolumenal surfaces did not reveal evidence of trauma in either model. Hydroflotation magnetic-aided endolumenal navigation (HMAEN) of a microdevice was achieved endolumenally with targeted real-time control and with no observed trauma to the structures. HMAEN could potentially be used to guide devices like the EBW to permit diagnostic and therapeutic ureteroscopy including biopsy of ureteral and renal pelvis lesions, thus ushering in the platform for the next paradigm in endolumenal urologic procedures.

  6. Coastal Piloting & Charting: Navigation 101.

    ERIC Educational Resources Information Center

    Osinski, Alison

    This curriculum guide for a beginning course on marine navigation describes marine navigation (the art of and science of determining position of a ship and its movement from one position to another in order to keep track of where the ship is and where it is going) and defines dead reckoning, piloting, electronic navigation, and celestial…

  7. Wasp-waist populations and marine ecosystem dynamics: Navigating the “ predator pit” topographies

    NASA Astrophysics Data System (ADS)

    Bakun, Andrew

    2006-02-01

    Many marine ecosystems exhibit a characteristic “wasp-waist” structure, where a single species, or at most several species, of small planktivorous fishes entirely dominate their trophic level. These species have complex life histories that result in radical variability that may propagate to both higher and lower trophic levels of the ecosystem. In addition, these populations have two key attributes: (1) they represent the lowest trophic level that is mobile, so they are capable of relocating their area of operation according to their own internal dynamics; (2) they may prey upon the early life stages of their predators, forming an unstable feedback loop in the trophic system that may, for example, precipitate abrupt regime shifts. Experience with the typical “boom-bust” dynamics of this type of population, and with populations that interact trophically with them, suggests a “predator pit” type of dynamics. This features a refuge from predation when abundance is very low, very destructive predation between an abundance level sufficient to attract interest from predators and an abundance level sufficient to satiate available predators, and, as abundance increases beyond this satiation point, decreasing specific predation mortality and population breakout. A simple formalism is developed to describe these dynamics. Examples of its application include (a) a hypothetical mechanism for progressive geographical habitat expansion at high biomass, (b) an explanation for the out-of-phase alternations of abundances of anchovies and sardines in many regional systems that appear to occur without substantial adverse interactions between the two species groups, and (c) an account of an interaction of environmental processes and fishery exploitation that caused a regime shift. The last is the example of the Baltic Sea, where the cod resource collapsed in concert with establishment of dominance of that ecosystem by the cod’s ‘wasp-waist” prey, herring and sprat.

  8. A Predeployment Limited Technical Assessment of the iPod Touch to Aid the United States Marine Corps

    DTIC Science & Technology

    2009-08-01

    ASSESSMENT OF THE IPOD TOUCH TO AID THE UNITED STATES MARINE CORPS BY PETER N. SQUIRE WARFARE SYSTEMS DEPARTMENT AUGUST 2009...2010 5a. CONTRACT NUMBER 5b. GRANT NUMBER 4. TITLE AND SUBTITLE A PREDEPLOYMENT LIMITED TECHNICAL ASSESSMENT OF THE IPOD TOUCH TO AID THE UNITED...public release; distribution is unlimited. 13. SUPPLEMENTARY NOTES "Safari," "iTunes," " iPod ," " iPod touch," and "iPhone" are registered trademarks

  9. 78 FR 68861 - Certain Navigation Products, Including GPS Devices, Navigation and Display Systems, Radar Systems...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-15

    ..., Navigational Aids, Mapping Systems and Related Software; Institution of Investigation Pursuant to 19 U.S.C... and display systems, radar systems, navigational aids, mapping systems and related software by reason... products, including GPS devices, navigation and display systems, radar systems, navigational aids,...

  10. Floating marine litter as a raft for drifting voyages for Planes minutus (Crustacea: Decapoda: Grapsidae) and Liocarcinus navigator (Crustacea: Decapoda: Polybiidae).

    PubMed

    Tutman, P; Kapiris, K; Kirinčić, M; Pallaoro, A

    2017-07-15

    The Columbus crab Planes minutus and Arch-fronted swimming crab Liocarcinus navigator, within their distribution ranges in the Mediterranean, were found rafted on plastic macro-litter floating on the open south Adriatic. While P. minutus was recorded from inanimate flotsam outside of the Mediterranean, L. navigator is herein reported for the first time on floating marine litter. The role of floating litter as habitat or as a dispersal agent for marine invertebrates has received quite attention however, records of decapod crabs drifting on litter has been relatively sparse. Our results suggests that vast quantities of floating debris, comprised primarily of non-biodegradable plastic polymers, probably will augment natural floating substrates in the marine environment, potentially facilitating the spread of invasive species. The dispersion of rafting crabs through floating debris should be investigated given the high potential ecological risk of invasion by exotic species due to the increase in waste production (ecological risk assessment). Copyright © 2017 Elsevier Ltd. All rights reserved.

  11. A high-accuracy two-position alignment inertial navigation system for lunar rovers aided by a star sensor with a calibration and positioning function

    NASA Astrophysics Data System (ADS)

    Lu, Jiazhen; Lei, Chaohua; Yang, Yanqiang; Liu, Ming

    2016-12-01

    An integrated inertial/celestial navigation system (INS/CNS) has wide applicability in lunar rovers as it provides accurate and autonomous navigational information. Initialization is particularly vital for a INS. This paper proposes a two-position initialization method based on a standard Kalman filter. The difference between the computed star vector and the measured star vector is measured. With the aid of a star sensor and the two positions, the attitudinal and positional errors can be greatly reduced, and the biases of three gyros and accelerometers can also be estimated. The semi-physical simulation results show that the positional and attitudinal errors converge within 0.07″ and 0.1 m, respectively, when the given initial positional error is 1 km and the attitudinal error is 10°. These good results show that the proposed method can accomplish alignment, positioning and calibration functions simultaneously. Thus the proposed two-position initialization method has the potential for application in lunar rover navigation.

  12. Application of computer-aided design and 3D-printed navigation template in Locking Compression Pediatric Hip Plate[Formula: see text] placement for pediatric hip disease.

    PubMed

    Zheng, Pengfei; Yao, Qingqiang; Xu, Peng; Wang, Liming

    2017-05-01

    To investigate the feasibility and accuracy of a drill template based on computer-aided design (CAD) and 3D printing technology for the placement of screws in Locking Compression Pediatric Hip Plate (LCP-PHP). LCP-PHP was used in 11 children [5 with femoral neck fracture and 6 with development dysplasia of hip (DDH)]. Using the CT data, the proximal femur model was created by a 3D printer. Fracture reduction and the placement of the screw in the femoral neck and the LCP-PHP were simulated by the computer. The navigation template was designed by the software to match the proximal femur. After the feasibility of the 3D model operation was demonstrated before the operation, the guide pins and the screws were inserted with the help of the navigate template in the operation. During surgery, the navigation template for each case was matched to the bony markers of the proximal femur. With the help of the template, in femoral neck fracture cases, three screws could be accurately inserted into the femoral neck to implant the LCP-PHP and stabilize the fracture. The template for DDH includes all operation parameters and steps for proximal femoral varus rotation and shortening osteotomy, which made the surgery much easier to perform. Radiographs taken after surgery showed that the postoperative results closely corresponded to the preoperative computer simulation. The average time taken for LCP-PHP placement was 26.5 min; radiography was used during surgery only for an average of 6.0 times. Postoperative radiographs showed good results. With the use of CAD and 3D printing technology, accurate placement of individualized navigation template of LCP-PHP can be achieved. This technology can reduce intraoperative damage to the femoral neck epiphysis, decrease operation time, reduce intraoperative hemorrhage, and decrease radiation exposure to patients and personnel during the surgery.

  13. Hänsel, Gretel and the slime mould—how an external spatial memory aids navigation in complex environments

    NASA Astrophysics Data System (ADS)

    Smith-Ferguson, Jules; Reid, Chris R.; Latty, Tanya; Beekman, Madeleine

    2017-10-01

    The ability to navigate through an environment is critical to most organisms’ ability to survive and reproduce. The presence of a memory system greatly enhances navigational success. Therefore, natural selection is likely to drive the creation of memory systems, even in non-neuronal organisms, if having such a system is adaptive. Here we examine if the external spatial memory system present in the acellular slime mould, Physarum polycephalum, provides an adaptive advantage for resource acquisition. P. polycephalum lays tracks of extracellular slime as it moves through its environment. Previous work has shown that the presence of extracellular slime allows the organism to escape from a trap in laboratory experiments simply by avoiding areas previously explored. Here we further investigate the benefits of using extracellular slime as an external spatial memory by testing the organism’s ability to navigate through environments of differing complexity with and without the ability to use its external memory. Our results suggest that the external memory has an adaptive advantage in ‘open’ and simple bounded environments. However, in a complex bounded environment, the extracellular slime provides no advantage, and may even negatively affect the organism’s navigational abilities. Our results indicate that the exact experimental set up matters if one wants to fully understand how the presence of extracellular slime affects the slime mould’s search behaviour.

  14. Tides. Marine Science Curriculum Aid No. 5. Sea Grant Report 80-2.

    ERIC Educational Resources Information Center

    McDonald, Judy

    This manual, developed for use in Alaskan secondary schools, is one of a continuing series designed to provide basic information about the marine environment and Alaskan marine resources. The first part of the manual presents information about tides, focusing on: the nature of tides; cause of tides; factors related to tidal movement; types of…

  15. Audiovisual Aids and Publications Available from the VIMS/Sea Grant Marine Education Center.

    ERIC Educational Resources Information Center

    Gammisch, Sue, Comp.

    This catalog contains an inventory of 16mm films, filmstrips, film loops, slide programs, records, and publications about the marine sciences and sea life that are available from VIMS/Sea Grant Marine Education Center; information on the borrowing of the AV materials is included, as well as prices for books and leaflets. The entries are listed…

  16. From Medical Image Computing to Computer Aided Intervention: Development of a Research Interface for Image Guided Navigation

    PubMed Central

    Papademetris, Xenophon; DeLorenzo, Christine; Flossmann, Sven; Neff, Markus; Vives, Kenneth P.; Spencer, Dennis D.; Staib, Lawrence H.; Duncan, James S.

    2009-01-01

    Background This paper describes the development and application of a research interface to integrate research image analysis software with a commercial image guided surgery navigation system. This interface enables bi-directional transfer of data such as images, visualizations and tool positions in real time. Methods We describe both the design and the application programming interface of the research interface, as well as show the function of an example client program. The resulting interface provides a practical and versatile link for bringing image analysis research techniques into the operating room (OR). Results We present examples from the successful use of this research interface in both phantom experiments and in real neurosurgeries. In particular we demonstrate that the integrated dual-computer system achieves tool tracking performance that is comparable to the more typical single-computer scenario. Conclusions Network interfaces for this type are viable solutions for the integration of commercial image-guided navigation systems and research software. PMID:19301361

  17. Aids to Navigation Turn Lights Principal Findings: Effects of Turn Lighting Characteristics, Buoy Arrangements, and Ship Size on Nighttime Piloting.

    DTIC Science & Technology

    1983-02-01

    simulator-based experiment on floating visual aids to naviga- tion was conducted at the Maritime Administration’s Computer Aided Operation Research...step of recognition is often called "identification." "Identification" seems to be the more familiar concept to the maritime industry; so that, rather...E. Galanter (eds.). Handbook of Mathematical Psychology. (Volume 1). New York: Wiley, 1963. 16T. Engen . "Psychophysics I: Discrimination and Detection

  18. Usability and navigability of an HIV/AIDS internet intervention for adolescents in a resource-limited setting.

    PubMed

    Ybarra, Michele L; Biringi, Ruth; Prescott, Tonya; Bull, Sheana S

    2012-11-01

    Use of the Internet is growing in Sub-Saharan Africa. Evidence of computer and Internet effectiveness for reduction in risk behaviors associated with HIV shown in US settings has yet to be replicated in Africa. We describe the development, usability, and navigability testing of an Internet-based HIV prevention program for secondary school students in Uganda, called CyberSenga. For this work, we used four data collection activities, including observation of (a) computer skills and (b) navigation, (c) focus group discussions, and (d) field assessments to document comprehension and usability of program content. We document limited skills among students, but youth with basic computer skills were able to navigate the program after instruction. Youth were most interested in activities with more interaction. Field testing illustrated the importance of using a stand-alone electrical source during program delivery. This work suggests that delivery of Internet-based health promotion content in Africa requires attention to user preparedness and literacy, bandwidth, Internet connection, and electricity.

  19. Usability and Navigability of an HIV/AIDS Internet Intervention for Adolescents in a Resource Limited Setting

    PubMed Central

    Ybarra, Michele; Biringi, Ruth; Prescott, Tonya; Bull, Sheana S.

    2012-01-01

    Use of Internet is growing in Sub Saharan Africa. Evidence of computer and Internet effectiveness for reduction in risk behaviors associated with HIV shown in U.S. settings has yet to be replicated in Africa. We describe the development, usability and navigability testing of an Internet-based HIV prevention program for secondary school students in Uganda, called CyberSenga. For this work, we used four data collection activities, including observation of (a) computer skills and (b) navigation, (c) focus group discussions, and (d) field assessments to document comprehension and usability of program content. We document limited skills among students, but youth with basic computers skills were able to navigate the program after instruction. Youth were most interested in activities with more interaction. Field-testing illustrated the importance of using a stand-alone electrical source during program delivery. This work suggests delivery of Internet-based health promotion content in Africa requires attention to user preparedness and literacy, bandwidth, Internet connection, and electricity. PMID:22918136

  20. Current opinion on computer-aided surgical navigation and robotics: role in the treatment of sports-related injuries.

    PubMed

    Musahl, Volker; Plakseychuk, Anton; Fu, Freddie H

    2002-01-01

    Computer-assisted surgery (CAS) may allow surgeons to be more precise and minimally invasive, in addition to being an excellent research tool. Medical imaging, such as magnetic resonance and computed tomography is not only an important diagnostic tool, but also a necessary planning tool. In orthopaedic sports medicine, precision is needed when placing tunnels for soft tissue fixation of replacement grafts. Two types of CAS systems -- passive and active -- have been developed. Passive systems, or surgical navigation systems, provide the surgeon with additional information prior to and during the surgical procedure (in real time). Active systems have the ability of performing certain surgical steps autonomously. Both active and passive CAS systems are currently a subject of basic science and clinical investigations and will be discussed and commented on in this article. In summary, passive navigation systems can provide additional information to the surgeon and can therefore lead to more precise tunnel placement. Active robotic technology seems to be accurate and feasible with promising initial results from Europe. However, active and passive CAS can only be as precise as the surgeon who plans the procedure. Therefore, future studies have to focus on integrating, arthroscopy, 3-D image-enhanced computer navigation, and virtual kinematics, as well as to increase precision in surgical techniques.

  1. Late Reconstruction of the Orbit With Patient-Specific Implants Using Computer-Aided Planning and Navigation.

    PubMed

    Baumann, Arnulf; Sinko, Klaus; Dorner, Guido

    2015-12-01

    Reconstruction of orbital deformities is a challenging task. Virtual 3-dimensional (3D) planning and the use of patient-specific implants (PSIs) could improve anatomic and functional outcomes in the orbital region. A retrospective study was performed of patients who underwent late orbital reconstruction from 2009 to 2013. To be included in the study, patients had a unilateral orbital deformity by involvement of at least 2 orbital wall defects. No orbital osteotomies could be used to correct the deformity. All patients underwent 3D virtual treatment planning. The unaffected orbit was mirrored onto the affected orbit. The PSI was fabricated according to this plan. Navigation was used to check the implant position. Six patients were included in this study. All patients had diplopia or motility limitations and enophthalmos. The ophthalmic parameters showed improvement in all patients. Enophthalmos was corrected adequately by the PSI. Four patients received a poly-ether-ether-ketone PSI. Two patients received a titanium mesh PSI. The position of the PSI was controlled by intraoperative navigation. Superimposition of the planned and postoperative positions of the PSI showed good correlation. PSIs placed with intraoperative navigation facilitate late or secondary correction of orbital deformities. Copyright © 2015 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.

  2. HIV, AIDS, and the Future

    MedlinePlus

    ... Navigation Bar Home Current Issue Past Issues HIV / AIDS HIV, AIDS, and the Future Past Issues / Summer 2009 Table ... and your loved ones from HIV/AIDS. The AIDS Memorial Quilt In 1987, a total of 1, ...

  3. APPLICATION OF COMPUTER AIDED TOMOGRAPHY (CAT) TO THE STUDY OF MARINE BENTIC COMMUNITIES

    EPA Science Inventory

    Sediment cores were imaged using a Computer-Aided Tomography (CT) scanner at Massachusetts General Hospital, Boston, Massachusetts, United States. Procedures were developed, using the attenuation of X-rays, to differentiate between sediment and the water contained in macrobenthic...

  4. APPLICATION OF COMPUTER AIDED TOMOGRAPHY (CAT) TO THE STUDY OF MARINE BENTIC COMMUNITIES

    EPA Science Inventory

    Sediment cores were imaged using a Computer-Aided Tomography (CT) scanner at Massachusetts General Hospital, Boston, Massachusetts, United States. Procedures were developed, using the attenuation of X-rays, to differentiate between sediment and the water contained in macrobenthic...

  5. 33 CFR 66.10-35 - Navigation lights.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Navigation lights. 66.10-35... NAVIGATION PRIVATE AIDS TO NAVIGATION Uniform State Waterway Marking System § 66.10-35 Navigation lights. A red light shall only be used on a solid colored red buoy. A green light shall only be used on a...

  6. 33 CFR 66.10-35 - Navigation lights.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Navigation lights. 66.10-35... NAVIGATION PRIVATE AIDS TO NAVIGATION Uniform State Waterway Marking System § 66.10-35 Navigation lights. A red light shall only be used on a solid colored red buoy. A green light shall only be used on a...

  7. 33 CFR 66.10-35 - Navigation lights.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Navigation lights. 66.10-35... NAVIGATION PRIVATE AIDS TO NAVIGATION Uniform State Waterway Marking System § 66.10-35 Navigation lights. A red light shall only be used on a solid colored red buoy. A green light shall only be used on a...

  8. 33 CFR 66.10-35 - Navigation lights.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Navigation lights. 66.10-35... NAVIGATION PRIVATE AIDS TO NAVIGATION Uniform State Waterway Marking System § 66.10-35 Navigation lights. A red light shall only be used on a solid colored red buoy. A green light shall only be used on a...

  9. 33 CFR 66.10-35 - Navigation lights.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Navigation lights. 66.10-35... NAVIGATION PRIVATE AIDS TO NAVIGATION Uniform State Waterway Marking System § 66.10-35 Navigation lights. A red light shall only be used on a solid colored red buoy. A green light shall only be used on a...

  10. 33 CFR 64.31 - Determination of hazard to navigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Determination of hazard to navigation. 64.31 Section 64.31 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION MARKING OF STRUCTURES, SUNKEN VESSELS AND OTHER OBSTRUCTIONS...

  11. 33 CFR 64.31 - Determination of hazard to navigation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Determination of hazard to navigation. 64.31 Section 64.31 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION MARKING OF STRUCTURES, SUNKEN VESSELS AND OTHER OBSTRUCTIONS Miscellaneous...

  12. 33 CFR 64.31 - Determination of hazard to navigation.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Determination of hazard to navigation. 64.31 Section 64.31 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION MARKING OF STRUCTURES, SUNKEN VESSELS AND OTHER OBSTRUCTIONS Miscellaneous...

  13. 33 CFR 64.31 - Determination of hazard to navigation.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Determination of hazard to navigation. 64.31 Section 64.31 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION MARKING OF STRUCTURES, SUNKEN VESSELS AND OTHER OBSTRUCTIONS Miscellaneous...

  14. 33 CFR 64.31 - Determination of hazard to navigation.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Determination of hazard to navigation. 64.31 Section 64.31 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION MARKING OF STRUCTURES, SUNKEN VESSELS AND OTHER OBSTRUCTIONS Miscellaneous...

  15. Construction and Maintenance of Classroom Aquaria. Marine Science Curriculum Aid No. 2.

    ERIC Educational Resources Information Center

    Lee, Richard S.

    This manual introduces teachers to the biological systems at work in a marine aquarium. It provides guidance in selection of the tanks, specifically discussing the effect of capacity on the well-being of the occupants. It guides the teacher in setting up aeration, filtering, lighting, and temperature control for the aquarium. It also advises on…

  16. Fully Self-Contained Vision-Aided Navigation and Landing of a Micro Air Vehicle Independent from External Sensor Inputs

    NASA Technical Reports Server (NTRS)

    Brockers, Roland; Susca, Sara; Zhu, David; Matthies, Larry

    2012-01-01

    Direct-lift micro air vehicles have important applications in reconnaissance. In order to conduct persistent surveillance in urban environments, it is essential that these systems can perform autonomous landing maneuvers on elevated surfaces that provide high vantage points without the help of any external sensor and with a fully contained on-board software solution. In this paper, we present a micro air vehicle that uses vision feedback from a single down looking camera to navigate autonomously and detect an elevated landing platform as a surrogate for a roof top. Our method requires no special preparation (labels or markers) of the landing location. Rather, leveraging the planar character of urban structure, the landing platform detection system uses a planar homography decomposition to detect landing targets and produce approach waypoints for autonomous landing. The vehicle control algorithm uses a Kalman filter based approach for pose estimation to fuse visual SLAM (PTAM) position estimates with IMU data to correct for high latency SLAM inputs and to increase the position estimate update rate in order to improve control stability. Scale recovery is achieved using inputs from a sonar altimeter. In experimental runs, we demonstrate a real-time implementation running on-board a micro aerial vehicle that is fully self-contained and independent from any external sensor information. With this method, the vehicle is able to search autonomously for a landing location and perform precision landing maneuvers on the detected targets.

  17. Design of a multi-sensor sonar system for indoor range measurement as a navigational aid for the blind.

    PubMed

    Choudhury, Maroof H; Barreto, Armando

    2003-01-01

    This paper reports the methodology for the design of a sonar-based ranging and guidance system. The intended application of the system is to help a blind person avoid obstacles as he/she navigates his/her environment. Six sonar transceivers are arranged radially on a headgear worn by the user. The transceivers detect discrete range data at discrete-time sampling instances. A panoramic map of the environment is generated from the discrete-space sensory data. The paper emphasizes the challenges faced during the measurement of omnidirectional ranging information in indoor environments. Situations have been identified where erroneous range readings are generated due to channel cross talk caused by echo bouncing off multiple surfaces. Several sonar control and measurement schemes were developed and tested to avoid these situations. The results and performance of these different control schemes are compared in this paper. A microcontroller-based system commands the sonar ping sequences, acquires the echo return times and computes the ranges. The set of range data is transmitted to a PC, which utilizes the information to build a spatialized audio map of the surrounding obstacles. The hardware and software layout for the system are described in this paper.

  18. Fully Self-Contained Vision-Aided Navigation and Landing of a Micro Air Vehicle Independent from External Sensor Inputs

    NASA Technical Reports Server (NTRS)

    Brockers, Roland; Susca, Sara; Zhu, David; Matthies, Larry

    2012-01-01

    Direct-lift micro air vehicles have important applications in reconnaissance. In order to conduct persistent surveillance in urban environments, it is essential that these systems can perform autonomous landing maneuvers on elevated surfaces that provide high vantage points without the help of any external sensor and with a fully contained on-board software solution. In this paper, we present a micro air vehicle that uses vision feedback from a single down looking camera to navigate autonomously and detect an elevated landing platform as a surrogate for a roof top. Our method requires no special preparation (labels or markers) of the landing location. Rather, leveraging the planar character of urban structure, the landing platform detection system uses a planar homography decomposition to detect landing targets and produce approach waypoints for autonomous landing. The vehicle control algorithm uses a Kalman filter based approach for pose estimation to fuse visual SLAM (PTAM) position estimates with IMU data to correct for high latency SLAM inputs and to increase the position estimate update rate in order to improve control stability. Scale recovery is achieved using inputs from a sonar altimeter. In experimental runs, we demonstrate a real-time implementation running on-board a micro aerial vehicle that is fully self-contained and independent from any external sensor information. With this method, the vehicle is able to search autonomously for a landing location and perform precision landing maneuvers on the detected targets.

  19. GPS-aided inertial technology and navigation-based photogrammetry for aerial mapping the San Andreas fault system

    USGS Publications Warehouse

    Sanchez, Richard D.; Hudnut, Kenneth W.

    2004-01-01

    Aerial mapping of the San Andreas Fault System can be realized more efficiently and rapidly without ground control and conventional aerotriangulation. This is achieved by the direct geopositioning of the exterior orientation of a digital imaging sensor by use of an integrated Global Positioning System (GPS) receiver and an Inertial Navigation System (INS). A crucial issue to this particular type of aerial mapping is the accuracy, scale, consistency, and speed achievable by such a system. To address these questions, an Applanix Digital Sensor System (DSS) was used to examine its potential for near real-time mapping. Large segments of vegetation along the San Andreas and Cucamonga faults near the foothills of the San Bernardino and San Gabriel Mountains were burned to the ground in the California wildfires of October-November 2003. A 175 km corridor through what once was a thickly vegetated and hidden fault surface was chosen for this study. Both faults pose a major hazard to the greater Los Angeles metropolitan area and a near real-time mapping system could provide information vital to a post-disaster response.

  20. 32 CFR 644.3 - Navigation Projects.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 4 2010-07-01 2010-07-01 true Navigation Projects. 644.3 Section 644.3 National... HANDBOOK Project Planning Civil Works § 644.3 Navigation Projects. (a) Land to be acquired in fee. All... channel improvements, navigation pools, navigation aids, and spoil disposal areas for future...

  1. 32 CFR 644.3 - Navigation projects.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 4 2012-07-01 2011-07-01 true Navigation projects. 644.3 Section 644.3 National... HANDBOOK Project Planning Civil Works § 644.3 Navigation projects. (a) Land to be acquired in fee. All... channel improvements, navigation pools, navigation aids, and spoil disposal areas for future...

  2. 32 CFR 644.3 - Navigation projects.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 4 2011-07-01 2011-07-01 false Navigation projects. 644.3 Section 644.3... ESTATE HANDBOOK Project Planning Civil Works § 644.3 Navigation projects. (a) Land to be acquired in fee... for channel improvements, navigation pools, navigation aids, and spoil disposal areas for...

  3. 32 CFR 644.3 - Navigation projects.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 4 2014-07-01 2013-07-01 true Navigation projects. 644.3 Section 644.3 National... HANDBOOK Project Planning Civil Works § 644.3 Navigation projects. (a) Land to be acquired in fee. All... channel improvements, navigation pools, navigation aids, and spoil disposal areas for future...

  4. 32 CFR 644.3 - Navigation projects.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 4 2013-07-01 2013-07-01 false Navigation projects. 644.3 Section 644.3... ESTATE HANDBOOK Project Planning Civil Works § 644.3 Navigation projects. (a) Land to be acquired in fee... for channel improvements, navigation pools, navigation aids, and spoil disposal areas for...

  5. HIV / AIDS: An Unequal Burden

    MedlinePlus

    ... Navigation Bar Home Current Issue Past Issues HIV / AIDS HIV / AIDS: An Unequal Burden Past Issues / Summer 2009 Table ... Victoria Cargill talks to students about HIV and AIDS at the opening of a National Library of ...

  6. Serendipity, International Cooperation and Navigational Aids: A History of Radio Echo Sounding (RES) Technologies, 1958-1979

    NASA Astrophysics Data System (ADS)

    Turchetti, S.; Dean, K.; Naylor, S.; Siegert, M. J.

    2006-12-01

    This paper explores the history of RES and examines major technological advances that fostered the use of this technique in the sub-glacial exploration of Antarctica. The paper will especially focus on three themes: the role played by accidental discoveries in the origins of RES; the importance of international collaboration in its technological development; and the need of establishing new technological networks in the deployment of RES apparatus during Antarctic missions. The origins of RES can be traced back to two important -albeit accidental- findings. First, during post-war US military operations in the Antarctic radio altimeters produced gross errors in height indication. Furthermore, during the IGY ionospheric research and sounding was hampered by interference due to bottom echoes. These serendipitous events helped to figure out that the Antarctic ice was transparent to certain frequencies, and therefore new radio technologies could be used to sound what lay beneath it. The establishment of the Scientific Committee on Antarctic Research (SCAR) and the Antarctic Treaty (AT) provided a new international framework vital to the development of RES technologies. This allowed researchers from different countries to come together and discuss important technological features for the first time. At a technical level, the setting up of international experiments (such as those of 1963 and 1964 in Greenland) gave an opportunity for experts from different countries to compare the performance of new RES apparatus. At a political level, the parallel debate within the AT community on the allocation of Antarctic radio frequencies helped radio engineers to work out ways to circumvent interference with radio communications. Finally, the deployment of RES equipment in Antarctic exploration relied upon a number of technological aids to improve the potential and accuracy of geophysical sounding. The use of new aircrafts, guidance systems, and computers proved vital in many

  7. CFD aided optimization of an innovative SCR catalyst design for heavy-duty marine diesel engines

    NASA Astrophysics Data System (ADS)

    Krastev, V. K.; Russo, S.; Verdemare, D.; Recine, G.; Biferale, L.; Falcucci, G.

    2016-06-01

    In this paper, the design of a new system for reducing NOx from exhaust gases from marine engines is shown. The core of the system is represented by the Selective Catalytic Reduction (SCR) reactor, in which the catalyst is made of titanium dioxide nano-fibers functionalized with metal oxides and deposited by electrospinning on a corrugated metal support. Compared to the current monolithic reactor designs, the high specific surface offered by the fibers allows in principle to satisfy the TIER III emission standards, with a consistent saving in the reactor volume. To optimize the reactor design process, a Computational Fluid Dynamics (CFD) model has been developed, alongside experimental measurements and numerical simulations. Results of different configurations are reported and critically assessed.

  8. Integrated multisensor navigation systems

    NASA Technical Reports Server (NTRS)

    Vangraas, Frank

    1988-01-01

    The multisensor navigation systems research evolved from the availability of several stand alone navigation systems and the growing concern for aircraft navigation reliability and safety. The intent is to develop a multisensor navigation system during the next decade that will be capable of providing reliable aircraft position data. These data will then be transmitted directly, or by satellite, to surveillance centers to aid the process of air traffic flow control. In order to satisfy the requirements for such a system, the following issues need to be examined: performance, coverage, reliability, availability, and integrity. The presence of a multisensor navigation system in all aircraft will improve safety for the aviation community and allow for more economical operation.

  9. Space shuttle navigation analysis

    NASA Technical Reports Server (NTRS)

    Jones, H. L.; Luders, G.; Matchett, G. A.; Sciabarrasi, J. E.

    1976-01-01

    A detailed analysis of space shuttle navigation for each of the major mission phases is presented. A covariance analysis program for prelaunch IMU calibration and alignment for the orbital flight tests (OFT) is described, and a partial error budget is presented. The ascent, orbital operations and deorbit maneuver study considered GPS-aided inertial navigation in the Phase III GPS (1984+) time frame. The entry and landing study evaluated navigation performance for the OFT baseline system. Detailed error budgets and sensitivity analyses are provided for both the ascent and entry studies.

  10. Using a linked data approach to aid development of a metadata portal to support Marine Strategy Framework Directive (MSFD) implementation

    NASA Astrophysics Data System (ADS)

    Wood, Chris

    2016-04-01

    Under the Marine Strategy Framework Directive (MSFD), EU Member States are mandated to achieve or maintain 'Good Environmental Status' (GES) in their marine areas by 2020, through a series of Programme of Measures (PoMs). The Celtic Seas Partnership (CSP), an EU LIFE+ project, aims to support policy makers, special-interest groups, users of the marine environment, and other interested stakeholders on MSFD implementation in the Celtic Seas geographical area. As part of this support, a metadata portal has been built to provide a signposting service to datasets that are relevant to MSFD within the Celtic Seas. To ensure that the metadata has the widest possible reach, a linked data approach was employed to construct the database. Although the metadata are stored in a traditional RDBS, the metadata are exposed as linked data via the D2RQ platform, allowing virtual RDF graphs to be generated. SPARQL queries can be executed against the end-point allowing any user to manipulate the metadata. D2RQ's mapping language, based on turtle, was used to map a wide range of relevant ontologies to the metadata (e.g. The Provenance Ontology (prov-o), Ocean Data Ontology (odo), Dublin Core Elements and Terms (dc & dcterms), Friend of a Friend (foaf), and Geospatial ontologies (geo)) allowing users to browse the metadata, either via SPARQL queries or by using D2RQ's HTML interface. The metadata were further enhanced by mapping relevant parameters to the NERC Vocabulary Server, itself built on a SPARQL endpoint. Additionally, a custom web front-end was built to enable users to browse the metadata and express queries through an intuitive graphical user interface that requires no prior knowledge of SPARQL. As well as providing means to browse the data via MSFD-related parameters (Descriptor, Criteria, and Indicator), the metadata records include the dataset's country of origin, the list of organisations involved in the management of the data, and links to any relevant INSPIRE

  11. 33 CFR 74.01-15 - Charges for placement of temporary aids.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... temporary aids. 74.01-15 Section 74.01-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION CHARGES FOR COAST GUARD AIDS TO NAVIGATION WORK Charges to the Public § 74.01-15 Charges for placement of temporary aids. Charges for placement of temporary aids will...

  12. 33 CFR 74.01-15 - Charges for placement of temporary aids.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... temporary aids. 74.01-15 Section 74.01-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION CHARGES FOR COAST GUARD AIDS TO NAVIGATION WORK Charges to the Public § 74.01-15 Charges for placement of temporary aids. Charges for placement of temporary aids will...

  13. 33 CFR 74.01-15 - Charges for placement of temporary aids.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... temporary aids. 74.01-15 Section 74.01-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION CHARGES FOR COAST GUARD AIDS TO NAVIGATION WORK Charges to the Public § 74.01-15 Charges for placement of temporary aids. Charges for placement of temporary aids will...

  14. 33 CFR 74.01-15 - Charges for placement of temporary aids.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... temporary aids. 74.01-15 Section 74.01-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION CHARGES FOR COAST GUARD AIDS TO NAVIGATION WORK Charges to the Public § 74.01-15 Charges for placement of temporary aids. Charges for placement of temporary aids will...

  15. 33 CFR 74.01-15 - Charges for placement of temporary aids.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... temporary aids. 74.01-15 Section 74.01-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY AIDS TO NAVIGATION CHARGES FOR COAST GUARD AIDS TO NAVIGATION WORK Charges to the Public § 74.01-15 Charges for placement of temporary aids. Charges for placement of temporary aids will...

  16. The mini-O, a digital superhet, or a truly low-cost Omega navigation receiver

    NASA Technical Reports Server (NTRS)

    Burhans, R. W.

    1975-01-01

    A quartz tuning fork filter circuit and some unique CMOS clock logic methods provide a very simple OMEGA-VLF receiver with true hyperbolic station pair phase difference outputs. An experimental system was implemented on a single battery-operated circuit board requiring only an external antenna preamplifier, and LOP output recorder. A bench evaluation and preliminary navigation tests indicate the technique is viable and can provide very low-cost OMEGA measurement systems. The method is promising for marine use with small boats in the present form, but might be implemented in conjunction with digital microprocessors for airborne navigation aids.

  17. 75 FR 18449 - Regulated Navigation Areas; Bars Along the Coasts of Oregon and Washington; Amendment

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-12

    ...: The Coast Guard proposes to change the Regulated Navigation Area (RNA) covering the Umpqua River Bar... ``Navigation Aid Number 6'' on the Umpqua River. The change has been requested by a number of individuals and... between ``Navigation Aid Number 8'' and ``Navigation Aid Number 6'' in the Umpqua River when the bar is...

  18. Magnetic Field Aided Indoor Navigation

    DTIC Science & Technology

    2009-03-01

    Complementary Science Series. Harcourt/Academic Press, San Diego, CA, 2001. 2. Fraden, Jacob. Velocity and Acceleration, 301–312. Handbook of Modern Sensors - Physics , Designs and Applications . Springer

  19. Navigated unicompartmental knee replacement.

    PubMed

    Jenny, Jean-Yves

    2008-06-01

    Computer-aided systems have been developed recently to improve the precision of implantation of unicompartmental knee replacement (UKR) or total knee replacement. Minimal invasive techniques have been developed to decrease the surgical trauma related to the prosthesis implantation. However, there might be a concern about the potential of minimal invasive techniques for a loss of accuracy. Navigation systems might address this issue. We are currently using routinely a nonimage-based navigation for total knee replacement. We developed a modified system for UKR, suitable for either a conventional or a mini-invasive approach. Navigated implantation of a UKR allowed improving the accuracy of the radiologic implantation. Mini-invasive implantation was effective, but the accuracy may not reach that of the conventional navigated technique and should be still improved. Minimal invasive techniques have to be validated because a loss of accuracy will negatively influence long-term outcomes.

  20. 33 CFR 100.901 - Great Lakes annual marine events.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Great Lakes annual marine events... REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.901 Great Lakes annual marine events. Permanent special local regulations are hereby established for the marine events listed in Table 1....

  1. 33 CFR 100.901 - Great Lakes annual marine events.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Great Lakes annual marine events... REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.901 Great Lakes annual marine events. Permanent special local regulations are hereby established for the marine events listed in Table 1....

  2. 33 CFR 100.901 - Great Lakes annual marine events.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Great Lakes annual marine events... REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.901 Great Lakes annual marine events. Permanent special local regulations are hereby established for the marine events listed in Table 1....

  3. 33 CFR 72.01-25 - Marine broadcast notice to mariners.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... report navigational warnings containing information of importance to the safety of navigation of vessels, such as the position of ice and derelicts, defects, and changes to aids to navigation, and drifting...

  4. AUTOMATIC NAVIGATION.

    DTIC Science & Technology

    NAVIGATION, REPORTS), (*CONTROL SYSTEMS, *INFORMATION THEORY), ABSTRACTS, OPTIMIZATION, DYNAMIC PROGRAMMING, GAME THEORY, NONLINEAR SYSTEMS, CORRELATION TECHNIQUES, FOURIER ANALYSIS, INTEGRAL TRANSFORMS, DEMODULATION, NAVIGATION CHARTS, PATTERN RECOGNITION, DISTRIBUTION THEORY , TIME SHARING, GRAPHICS, DIGITAL COMPUTERS, FEEDBACK, STABILITY

  5. 78 FR 32412 - Navigation Safety Advisory Council; Vacancies

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-30

    ... the Road; navigation regulations and equipment, routing measures, marine information, diving safety... SECURITY Coast Guard Navigation Safety Advisory Council; Vacancies AGENCY: Coast Guard, DHS. ACTION... Safety Advisory Council (NAVSAC). NAVSAC provides advice and recommendations to the Secretary of Homeland...

  6. 76 FR 33773 - Navigation Safety Advisory Council; Vacancies

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-09

    ... the Road, navigation regulations and equipment, routing measures, marine information, diving safety... SECURITY Coast Guard Navigation Safety Advisory Council; Vacancies AGENCY: Coast Guard, DHS. ACTION... Safety Advisory Council (NAVSAC). NAVSAC provides advice and recommendations to the Secretary, Department...

  7. Marine Education Knowledge Inventory.

    ERIC Educational Resources Information Center

    Hounshell, Paul B.; Hampton, Carolyn

    This 35-item, multiple-choice Marine Education Knowledge Inventory was developed for use in upper elementary/middle schools to measure a student's knowledge of marine science. Content of test items is drawn from oceanography, ecology, earth science, navigation, and the biological sciences (focusing on marine animals). Steps in the construction of…

  8. 14 CFR 121.349 - Communication and navigation equipment for operations under VFR over routes not navigated by...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... operations under VFR over routes not navigated by pilotage or for operations under IFR or over the top. 121... pilotage or for operations under IFR or over the top. (a) Navigation equipment requirements—General. No... conducted under IFR or over the top, unless— (1) The en route navigation aids necessary for navigating...

  9. 14 CFR 121.349 - Communication and navigation equipment for operations under VFR over routes not navigated by...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... operations under VFR over routes not navigated by pilotage or for operations under IFR or over the top. 121... pilotage or for operations under IFR or over the top. (a) Navigation equipment requirements—General. No... conducted under IFR or over the top, unless— (1) The en route navigation aids necessary for navigating...

  10. National Institutes of Health, Office of AIDS Research

    MedlinePlus

    ... Search Term(s): Main Navigation for the Office of AIDS Research Homepage ABOUT OAR SCIENTIFIC AREAS STRATEGIC PLAN ... HIV/AIDS INFORMATION Welcome to the Office of AIDS Research. Welcome to the Office of AIDS Research ...

  11. Inertial Navigation

    DTIC Science & Technology

    also been well-known for some time. However, inertial navigation systems (called inertial guidance systems in rocket technology) which are composed of... navigation technology has developed rapidly, and the precision of inertial navigation has increased greatly. In 1944, the ’V-2’ rocket made the first...gyroscopes, accelerometers, and electronic computers have only been on the market for a little over twenty years. In the past twenty years, inertial

  12. NASA tracking ship navigation systems

    NASA Technical Reports Server (NTRS)

    Mckenna, J. J.

    1976-01-01

    The ship position and attitude measurement system that was installed aboard the tracking ship Vanguard is described. An overview of the entire system is given along with a description of how precise time and frequency is utilized. The instrumentation is broken down into its basic components. Particular emphasis is given to the inertial navigation system. Each navigation system used, a mariner star tracker, navigation satellite system, Loran C and OMEGA in conjunction with the inertial system is described. The accuracy of each system is compared along with their limitations.

  13. 33 CFR 144.01-30 - First-aid kit.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false First-aid kit. 144.01-30 Section 144.01-30 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES LIFESAVING APPLIANCES Manned Platforms § 144.01-30 First-aid kit....

  14. Micro Navigator

    NASA Technical Reports Server (NTRS)

    Blaes, B. R.; Kia, T.; Chau, S. N.

    2001-01-01

    Miniature high-performance low-mass space avionics systems are desired for planned future outer planetary exploration missions (i.e. Europa Orbiter/Lander, Pluto-Kuiper Express). The spacecraft fuel and mass requirements enabling orbit insertion is the driving requirement. The Micro Navigator is an integrated autonomous Guidance, Navigation & Control (GN&C)micro-system that would provide the critical avionics function for navigation, pointing, and precision landing. The Micro Navigator hardware and software allow fusion of data from multiple sensors to provide a single integrated vehicle state vector necessary for six degrees of freedom GN&C. The benefits of this MicroNavigator include: 1) The Micro Navigator employs MEMS devices that promise orders of magnitude reductions in mass power and volume of inertial sensors (accelerometers and gyroscopes), celestial sensing devices (startracker, sun sensor), and computing element; 2) The highly integrated nature of the unit will reduce the cost of flight missions. a) The advanced miniaturization technologies employed by the Micro Navigator lend themselves to mass production, and therefore will reduce production cost of spacecraft. b) The integral approach simplifies interface issues associated with discrete components and reduces cost associated with integration and test of multiple components; and 3) The integration of sensors and processing elements into a single unit will allow the Micro Navigator to encapsulate attitude information and determination functions into a single object. This is particularly beneficial for object-oriented software architectures that are used in advanced spacecraft. Additional information is contained in the original extended abstract.

  15. Micro Navigator

    NASA Astrophysics Data System (ADS)

    Blaes, B. R.; Kia, T.; Chau, S. N.

    2001-01-01

    Miniature high-performance low-mass space avionics systems are desired for planned future outer planetary exploration missions (i.e. Europa Orbiter/Lander, Pluto-Kuiper Express). The spacecraft fuel and mass requirements enabling orbit insertion is the driving requirement. The Micro Navigator is an integrated autonomous Guidance, Navigation & Control (GN&C)micro-system that would provide the critical avionics function for navigation, pointing, and precision landing. The Micro Navigator hardware and software allow fusion of data from multiple sensors to provide a single integrated vehicle state vector necessary for six degrees of freedom GN&C. The benefits of this MicroNavigator include: 1) The Micro Navigator employs MEMS devices that promise orders of magnitude reductions in mass power and volume of inertial sensors (accelerometers and gyroscopes), celestial sensing devices (startracker, sun sensor), and computing element; 2) The highly integrated nature of the unit will reduce the cost of flight missions. a) The advanced miniaturization technologies employed by the Micro Navigator lend themselves to mass production, and therefore will reduce production cost of spacecraft. b) The integral approach simplifies interface issues associated with discrete components and reduces cost associated with integration and test of multiple components; and 3) The integration of sensors and processing elements into a single unit will allow the Micro Navigator to encapsulate attitude information and determination functions into a single object. This is particularly beneficial for object-oriented software architectures that are used in advanced spacecraft. Additional information is contained in the original extended abstract.

  16. PATIENT NAVIGATION

    PubMed Central

    Wells, Kristen J.; Battaglia, Tracy A.; Dudley, Donald J.; Garcia, Roland; Greene, Amanda; Calhoun, Elizabeth; Mandelblatt, Jeanne S.; Paskett, Electra D.; Raich, Peter C.

    2008-01-01

    Background First implemented in 1990, patient navigation interventions are emerging as an approach to reduce cancer disparities. However, there is lack of consensus about how patient navigation is defined, what patient navigators do, and what their qualifications should be. Little is known about the efficacy and cost effectiveness of patient navigation. Methods We conducted a qualitative synthesis of published literature on cancer patient navigation. Using the keywords “navigator” or “navigation” and “cancer,” we identified 45 articles from Pubmed and reference searches that were published or in press through October 2007. 16 provided data on efficacy of navigation in improving timeliness and receipt of cancer screening, diagnostic follow-up care, and treatment. Patient navigation services are defined and differentiated from other outreach services. Results Overall there is evidence for some degree of efficacy for patient navigation in increasing participation in cancer screening and adherence to diagnostic follow-up care following an abnormality, with increases in screening ranging from 10.8% to 17.1% and increases in adherence to diagnostic follow-up care ranging from 21% to 29.2%, when compared to control patients. There is less evidence regarding efficacy of patient navigation in reducing either late stage cancer diagnosis or delays in initiation of cancer treatment or improving outcomes during cancer survivorship. There were methodological limitations in most studies, such as lack of control groups, small sample sizes, and contamination with other interventions. Conclusions Although cancer-related patient navigation interventions are being increasingly adopted across the U.S. and Canada, further research is necessary to evaluate their efficacy and cost-effectiveness in improving cancer care. PMID:18780320

  17. The sea, stingers, and surgeons: the surgeon's role in prevention, first aid, and management of marine envenomations.

    PubMed

    Pearn, J

    1995-01-01

    Marine envenomations are the statistical price that humankind pays for intruding into the aquatic domain. Individual risk can be reduced by knowledge and prudence. If envenomations do occur, lives can be saved, complications prevented, and convalescence facilitated by knowledge of and interest in these fascinating creatures of the sea.

  18. 33 CFR 100.40 - Patrol of the regatta or marine parade.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Patrol of the regatta or marine... SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.40 Patrol of the regatta or marine parade. (a) The Commander of a Coast Guard District in which a regatta or marine parade is to...

  19. 33 CFR 100.40 - Patrol of the regatta or marine parade.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Patrol of the regatta or marine... SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.40 Patrol of the regatta or marine parade. (a) The Commander of a Coast Guard District in which a regatta or marine parade is to...

  20. 33 CFR 100.40 - Patrol of the regatta or marine parade.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Patrol of the regatta or marine... SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.40 Patrol of the regatta or marine parade. (a) The Commander of a Coast Guard District in which a regatta or marine parade is to...

  1. SMALL CRAFT OPERATION AND NAVIGATION.

    ERIC Educational Resources Information Center

    Louisiana State Dept. of Education, Baton Rouge.

    THIS REFERENCE TEXTBOOK WAS PREPARED FOR USE IN THE FIRST PART OF A TWO-PART COURSE IN MARINE NAVIGATION AND SMALL CRAFT OPERATION ON INLAND AND INTERNATIONAL WATERS. THE MATERIAL WAS DEVELOPED BY AN INDIVIDUAL AUTHOR FOR USE IN TRADE SCHOOL PREPARATORY AND EXTENSION CLASSES FOR MALE ADULTS WHO PLAN TO OPERATE BOATS. IT IS MAINLY CONCERNED WITH…

  2. APPLICATION OF 3D COMPUTER-AIDED TOMOGRAPHY TO THE QUANTIFICATION OF MARINE SEDIMENT COMMUNITIES IN POLLUTION GRADIENTS

    EPA Science Inventory

    Computer-Aided Tomography (CT) has been demonstrated to be a cost efficient tool for the qualitative and quantitative study of estuarine benthic communities along pollution gradients.
    Now we have advanced this technology to successfully visualize and discriminate three dimen...

  3. 33 CFR 151.3000 - Definition of marine debris for the purposes of the Marine Debris Research, Prevention, and...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Definition of marine debris for the purposes of the Marine Debris Research, Prevention, and Reduction Act. 151.3000 Section 151.3000... Definition of Marine Debris for the Purposes of the Marine Debris Research, Prevention, and Reduction Act...

  4. Situation awareness and driving performance in a simulated navigation task.

    PubMed

    Ma, R; Kaber, D B

    2007-08-01

    The objective of this study was to identify task and vehicle factors that may affect driver situation awareness (SA) and its relationship to performance, particularly in strategic (navigation) tasks. An experiment was conducted to assess the effects of in-vehicle navigation aids and reliability on driver SA and performance in a simulated navigation task. A total of 20 participants drove a virtual car and navigated a large virtual suburb. They were required to follow traffic signs and navigation directions from either a human aid via a mobile phone or an automated aid presented on a laptop. The navigation aids operated under three different levels of information reliability (100%, 80% and 60%). A control condition was used in which each aid presented a telemarketing survey and participants navigated using a map. Results revealed perfect navigation information generally improved driver SA and performance compared to unreliable navigation information and the control condition (task-irrelevant information). In-vehicle automation appears to mediate the relationship of driver SA to performance in terms of operational and strategic (navigation) behaviours. The findings of this work support consideration of driver SA in the design of future vehicle automation for navigation tasks.

  5. 77 FR 15784 - Navigation Safety Advisory Council; Vacancies

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-16

    ... vessel navigation Rules of the Road, aids to maritime navigation, maritime law, vessel safety, port... SECURITY Coast Guard Navigation Safety Advisory Council; Vacancies AGENCY: Coast Guard, DHS. ACTION... Safety Advisory Council (NAVSAC). NAVSAC provides advice and recommendations to the Secretary of Homeland...

  6. 75 FR 23793 - Houston/Galveston Navigation Safety Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-04

    ... SECURITY Coast Guard Houston/Galveston Navigation Safety Advisory Committee AGENCY: Coast Guard, DHS. ACTION: Notice of meeting. SUMMARY: The Houston/Galveston Navigation Safety Advisory Committee... improvements, aids to navigation, area projects impacting safety on the Houston Ship Channel, and...

  7. 75 FR 6215 - Houston/Galveston Navigation Safety Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-08

    ... SECURITY Coast Guard Houston/Galveston Navigation Safety Advisory Committee AGENCY: Coast Guard, DHS. ACTION: Notice of meetings. SUMMARY: The Houston/Galveston Navigation Safety Advisory Committee... improvements, aids to navigation, area projects impacting safety on the Houston Ship Channel, and various...

  8. 14 CFR 121.121 - En route navigation facilities.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false En route navigation facilities. 121.121... Operations § 121.121 En route navigation facilities. (a) Except as provided in paragraph (b) of this section... (including to any destination, refueling or alternate airports) unless suitable navigation aids are available...

  9. 14 CFR 121.103 - En route navigation facilities.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false En route navigation facilities. 121.103... § 121.103 En route navigation facilities. (a) Except as provided in paragraph (b) of this section, each... regular, provisional, refueling or alternate airports), that suitable navigation aids are available to...

  10. 14 CFR 121.121 - En route navigation facilities.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false En route navigation facilities. 121.121... Operations § 121.121 En route navigation facilities. (a) Except as provided in paragraph (b) of this section... (including to any destination, refueling or alternate airports) unless suitable navigation aids are available...

  11. 14 CFR 125.51 - En route navigation facilities.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false En route navigation facilities. 125.51... and Miscellaneous Requirements § 125.51 En route navigation facilities. (a) Except as provided in... any destination, refueling or alternate airports) unless suitable navigation aids are available over...

  12. 14 CFR 121.103 - En route navigation facilities.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false En route navigation facilities. 121.103... § 121.103 En route navigation facilities. (a) Except as provided in paragraph (b) of this section, each... regular, provisional, refueling or alternate airports), that suitable navigation aids are available to...

  13. 14 CFR 125.51 - En route navigation facilities.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false En route navigation facilities. 125.51... and Miscellaneous Requirements § 125.51 En route navigation facilities. (a) Except as provided in... any destination, refueling or alternate airports) unless suitable navigation aids are available over...

  14. 14 CFR 121.103 - En route navigation facilities.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false En route navigation facilities. 121.103... § 121.103 En route navigation facilities. (a) Except as provided in paragraph (b) of this section, each... regular, provisional, refueling or alternate airports), that suitable navigation aids are available to...

  15. 14 CFR 125.51 - En route navigation facilities.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false En route navigation facilities. 125.51... and Miscellaneous Requirements § 125.51 En route navigation facilities. (a) Except as provided in... any destination, refueling or alternate airports) unless suitable navigation aids are available over...

  16. 14 CFR 121.121 - En route navigation facilities.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false En route navigation facilities. 121.121... Operations § 121.121 En route navigation facilities. (a) Except as provided in paragraph (b) of this section... (including to any destination, refueling or alternate airports) unless suitable navigation aids are available...

  17. 14 CFR 121.121 - En route navigation facilities.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false En route navigation facilities. 121.121... Operations § 121.121 En route navigation facilities. (a) Except as provided in paragraph (b) of this section... (including to any destination, refueling or alternate airports) unless suitable navigation aids are available...

  18. 14 CFR 125.51 - En route navigation facilities.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false En route navigation facilities. 125.51... and Miscellaneous Requirements § 125.51 En route navigation facilities. (a) Except as provided in... any destination, refueling or alternate airports) unless suitable navigation aids are available over...

  19. 14 CFR 121.103 - En route navigation facilities.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false En route navigation facilities. 121.103... § 121.103 En route navigation facilities. (a) Except as provided in paragraph (b) of this section, each... regular, provisional, refueling or alternate airports), that suitable navigation aids are available to...

  20. 14 CFR 121.121 - En route navigation facilities.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false En route navigation facilities. 121.121... Operations § 121.121 En route navigation facilities. (a) Except as provided in paragraph (b) of this section... (including to any destination, refueling or alternate airports) unless suitable navigation aids are available...

  1. 14 CFR 121.103 - En route navigation facilities.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false En route navigation facilities. 121.103... § 121.103 En route navigation facilities. (a) Except as provided in paragraph (b) of this section, each... regular, provisional, refueling or alternate airports), that suitable navigation aids are available to...

  2. 14 CFR 125.51 - En route navigation facilities.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false En route navigation facilities. 125.51... and Miscellaneous Requirements § 125.51 En route navigation facilities. (a) Except as provided in... any destination, refueling or alternate airports) unless suitable navigation aids are available over...

  3. Navigation Safety Analysis in Taiwanese Ports

    NASA Astrophysics Data System (ADS)

    Liu, Chung-Ping; Liang, Gin-Shuh; Su, Yuhling; Chu, Ching-Wu

    2006-05-01

    Many researchers have studied vessel systems to enhance navigation safety at sea, or analysed the statistics of marine casualties of different flagged vessels as well as the fatalities and injuries in ferry accidents. However, little research has been devoted to port safety and especially navigation safety within Taiwanese territorial waters where over a 10-year period there have been 3428 marine accidents with 548 deaths and 524 vessels sunk. In this paper, we use the Grey Relational Analysis (GRA) to analyse the marine accident records of each of Taiwan's commercial ports from 1992 2003. Then, after interviewing the port authority managers and marine specialists, we discover the concerns felt by these professionals about Taiwanese commercial ports. We provide suggestions to strengthen port navigation safety.

  4. HIV / AIDS: Symptoms, Diagnosis, Prevention and Treatment

    MedlinePlus

    Skip Navigation Bar Home Current Issue Past Issues HIV / AIDS HIV / AIDS: Symptoms , Diagnosis, Prevention and Treatment Past Issues / ... Most people who have become recently infected with HIV will not have any symptoms. They may, however, ...

  5. Satellite Navigation Backup Study

    DTIC Science & Technology

    2007-09-19

    Stakeholder 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Ov era ll All AC All G A Go v/S tnd s To tal U S US AC US G A US G ov /St nd s To tal E uro pe Eu rop...Engineering and Technology of Ohio University, Jacob L. Campbell contains a good survey of TRN technology history, applications, and component trade...71 Honeywell Precision Terrain Aided Navigation (PTAN) summary found in Jacob L. Campbell citation. NGATS Institute

  6. A STOL terminal area navigation system

    NASA Technical Reports Server (NTRS)

    Neuman, F.; Warner, D. N., Jr.

    1974-01-01

    The mechanization and performance of a STOL terminal area navigation system are described. The purpose of the navigation system is to allow flying with precision 4D-guidance along complex flight paths in the terminal area, and to develop requirements for STOL operations in the 1980s. The navigation aids include an experimental microwave landing system, MODILS. The systems description begins with the navigation aids. It is shown how the data are transformed and combined with other data to obtain position and velocity estimates. Also presented are some of the design changes and other features that were introduced as a result of flight testing. The various ways of displaying navigation-derived data are given. Finally, simulator and flight test results are discussed.

  7. Space shuttle entry and landing navigation analysis

    NASA Technical Reports Server (NTRS)

    Jones, H. L.; Crawford, B. S.

    1974-01-01

    A navigation system for the entry phase of a Space Shuttle mission which is an aided-inertial system which uses a Kalman filter to mix IMU data with data derived from external navigation aids is evaluated. A drag pseudo-measurement used during radio blackout is treated as an additional external aid. A comprehensive truth model with 101 states is formulated and used to generate detailed error budgets at several significant time points -- end-of-blackout, start of final approach, over runway threshold, and touchdown. Sensitivity curves illustrating the effect of variations in the size of individual error sources on navigation accuracy are presented. The sensitivity of the navigation system performance to filter modifications is analyzed. The projected overall performance is shown in the form of time histories of position and velocity error components. The detailed results are summarized and interpreted, and suggestions are made concerning possible software improvements.

  8. Oceanic Area System Improvement Study (OASIS). Volume VI. North Atlantic, Central East Pacific, and Caribbean Regions Navigation Systems Description.

    DTIC Science & Technology

    1981-09-01

    Accuracy and Reliability of NAT Navigation . . . .. 33 3.5 NAT Navigation Financial Information .......... ... 33 4. CEP NAVIGATION...35 4.1 Routes ........ ........................ 35 4.2 Navigation Aids . . ........ . ......... 35 4.3 CEP Navigation Accuracy and Reliability ...to predict when they will pass by certain points so other aircraft approaching those points can cross them without excessive delay (i.e., without

  9. 33 CFR 3.45-45 - Sector Sault Ste. Marie Marine Inspection Zone and Captain of the Port Zone; Marine Safety Unit...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Sector Sault Ste. Marie Marine Inspection Zone and Captain of the Port Zone; Marine Safety Unit Duluth. 3.45-45 Section 3.45-45 Navigation..., SECTORS, MARINE INSPECTION ZONES, AND CAPTAIN OF THE PORT ZONES Ninth Coast Guard District §...

  10. INL Autonomous Navigation System

    SciTech Connect

    2005-03-30

    The INL Autonomous Navigation System provides instructions for autonomously navigating a robot. The system permits high-speed autonomous navigation including obstacle avoidance, waypoing navigation and path planning in both indoor and outdoor environments.

  11. 78 FR 52941 - Cooperative Research and Development Agreement: Next Generation Arctic Navigational Safety...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-27

    ... Safety Information System AGENCY: Coast Guard, DHS. ACTION: Notice of intent; request for public comments... Navigational Safety Information System,'' which provides important, time-critical, information to mariners, in... to the ``Next Generation Arctic Maritime Navigational Safety Information System,'' which...

  12. Concept of "One Window" Data Exchange System Fulfilling the Recommendation for e-Navigation System

    NASA Astrophysics Data System (ADS)

    Filipkowski, Damian; Wawruch, Ryszard

    The implementation in maritime radio-communication of so called "One window concept" for exchange of information between a ship and a port and coastal state authorities requires designation of one contact point on shore for these purposes, e.g. harbour master or ships' monitoring or traffic control centre. In Poland, as contact points regional and local centres of the Polish National Maritime Safety System will be designated. Paper describes the proposal for system of data exchange between a ship and a shore contact point, containing definition, functions and architecture of proposed system, possible directions of information flow and levels of access, fulfilling requirements of this concept and recommendation for e-navigation system developed on the basis of the International Maritime Organization (IMO) and International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) working papers.

  13. Modelling and Simulation for Safe and Efficient Navigation in Narrow Waterways

    NASA Astrophysics Data System (ADS)

    Ince, A. N.; Topuz, E.

    2004-01-01

    This paper outlines the design of a Vessel Traffic Management and Information System (VTMIS) for the Turkish Straits and taking this as an example shows how modelling and simulation may aid safe and efficient navigation of vessels through waterways which are narrow and winding with changing currents and are therefore difficult to navigate and prone to accidents. Ship Handling and Vessel Traffic Flow simulation models and Hyrographic Prediction model are described and the simulation trials conducted under different traffic and environment conditions are discussed to show the role that these prediction and simulation programmes can play in preventing marine casualities in different waterways, which may result in loss of human lifes and property and contamination of the environment.

  14. Low cost omega navigation receiver

    NASA Technical Reports Server (NTRS)

    Lilley, R. W.

    1974-01-01

    The development of a low cost Omega navigation receiver is discussed. Emphasis is placed on the completion and testing of a modular, multipurpose Omega receiver which utilizes a digital memory-aided, phase-locked loop to provide phase measurement data to a variety of applications interfaces. The functional units contained in the prototype device are described. The receiver is capable of receiving and storing phase measurements for up to eight Omega signals and computes two switch-selectable lines of position, displaying this navigation data in chart-recorded form.

  15. 33 CFR 100.1304 - Annual Seattle Yacht Club's “Opening Day” Marine Parade.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Annual Seattle Yacht Club's “Opening Day” Marine Parade. (a) Regulated area. All of Portage Bay, with the... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Annual Seattle Yacht Club's âOpening Dayâ Marine Parade. 100.1304 Section 100.1304 Navigation and Navigable Waters COAST...

  16. 33 CFR 3.70-20 - Activities Far East Marine Inspection Zone.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Activities Far East Marine Inspection Zone. 3.70-20 Section 3.70-20 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY GENERAL COAST GUARD AREAS, DISTRICTS, SECTORS, MARINE INSPECTION ZONES, AND CAPTAIN OF THE...

  17. 33 CFR 3.70-20 - Activities Far East Marine Inspection Zone.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Activities Far East Marine Inspection Zone. 3.70-20 Section 3.70-20 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY GENERAL COAST GUARD AREAS, DISTRICTS, SECTORS, MARINE INSPECTION ZONES, AND CAPTAIN OF THE...

  18. Geographical Information Systems (GIS) as a Simple Tool to Aid Modelling of Particulate Waste Distribution at Marine Fish Cage Sites

    NASA Astrophysics Data System (ADS)

    Pérez, O. M.; Telfer, T. C.; Beveridge, M. C. M.; Ross, L. G.

    2002-04-01

    Deposition of particulate organic waste from marine fish farm cages on to sea-bed sediments can cause major changes to the benthic ecosystem. Validated spatial models are considered as the most cost-effective tools for predicting environmental impacts. An improved version of an existing predictive particulate waste distribution model for farmed Atlantic salmon ( Salmo salar L.) is presented, which uses Geographic Information Systems (GIS) combined with a spreadsheet. The model presented uses existing distribution algorithms but also incorporates functions to calculate feed loading for all the cages within a pontoon independently, spreads the input load over the whole cage area and simulates post-depositional distribution of the carbon. The model uses approximate estimates of feed and faecal waste derived from dietary considerations (mass balance model) and separate, unique settling velocities for waste feed and faecal particles. The model incorporates values of current speed and direction recorded over spring and neap tides. Output from the model is in the form of a contour plot of organic carbon (g C m -2), showing distribution of the particulate organic carbon material as deposited on the sea-bed. During this study using hydrographic data collected from near a fish farm, the model predicted a smooth gradient of sediment carbon concentrations which decreased with distance from the cages. Model performance was validated using measured levels of sediment carbon, and showed a significant correlation between predicted and actual sediment loading (R=0·7; P <0·01). The differences between predicted and measured quantities of carbon found at some sampling stations are likely to be due to processes not included in the model, such as small differences in bathymetry, differences in bottom type which may have increased or decreased the carbon distribution through saltation, or natural variation in the sediment composition.

  19. 33 CFR 100.734 - Annual Gasparilla Marine Parade; Hillsborough Bay, Tampa, FL.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Annual Gasparilla Marine Parade... HOMELAND SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.734 Annual Gasparilla Marine Parade; Hillsborough Bay, Tampa, FL. (a) Regulated Area. A regulated area is...

  20. 33 CFR 100.1103 - Northern California and Lake Tahoe area annual marine events.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Tahoe area annual marine events. 100.1103 Section 100.1103 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.1103 Northern California and Lake Tahoe area annual marine events. (a) General. Special local regulations...

  1. 33 CFR 164.61 - Marine casualty reporting and record retention.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Marine casualty reporting and... HOMELAND SECURITY (CONTINUED) PORTS AND WATERWAYS SAFETY NAVIGATION SAFETY REGULATIONS § 164.61 Marine casualty reporting and record retention. When a vessel is involved in a marine casualty as defined in...

  2. 33 CFR 164.61 - Marine casualty reporting and record retention.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Marine casualty reporting and... HOMELAND SECURITY (CONTINUED) PORTS AND WATERWAYS SAFETY NAVIGATION SAFETY REGULATIONS § 164.61 Marine casualty reporting and record retention. When a vessel is involved in a marine casualty as defined in...

  3. 33 CFR 164.61 - Marine casualty reporting and record retention.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Marine casualty reporting and... HOMELAND SECURITY (CONTINUED) PORTS AND WATERWAYS SAFETY NAVIGATION SAFETY REGULATIONS § 164.61 Marine casualty reporting and record retention. When a vessel is involved in a marine casualty as defined in...

  4. Viking navigation

    NASA Technical Reports Server (NTRS)

    Oneil, W. J.; Rudd, R. P.; Farless, D. L.; Hildebrand, C. E.; Mitchell, R. T.; Rourke, K. H.; Euler, E. A.

    1979-01-01

    A comprehensive description of the navigation of the Viking spacecraft throughout their flight from Earth launch to Mars landing is given. The flight path design, actual inflight control, and postflight reconstruction are discussed in detail. The preflight analyses upon which the operational strategies and performance predictions were based are discussed. The inflight results are then discussed and compared with the preflight predictions and, finally, the results of any postflight analyses are presented.

  5. 33 CFR 100.1104 - Southern California annual marine events for the Los Angeles Long Beach Captain of the Port Zone.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Southern California annual marine... Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.1104 Southern California annual marine events for the Los Angeles Long Beach...

  6. 33 CFR 100.150 - Special Local Regulations; Marine Events in the Coast Guard Sector New York Captain of the Port...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Special Local Regulations; Marine... and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.150 Special Local Regulations; Marine Events in the Coast...

  7. 33 CFR 164.38 - Automatic radar plotting aids (ARPA).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Automatic radar plotting aids... plotting aids (ARPA). (a) The following definitions are used in this section— Bulk means material in any... cargo residue. (b) An Automatic Radar Plotting Aid (ARPA) that complies with the standard for such...

  8. 33 CFR 144.01-30 - First-aid kit.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false First-aid kit. 144.01-30 Section...) OUTER CONTINENTAL SHELF ACTIVITIES LIFESAVING APPLIANCES Manned Platforms § 144.01-30 First-aid kit. On each manned platform a first-aid kit approved by the Commandant or the U.S. Bureau of Mines shall...

  9. 33 CFR 144.01-30 - First-aid kit.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false First-aid kit. 144.01-30 Section...) OUTER CONTINENTAL SHELF ACTIVITIES LIFESAVING APPLIANCES Manned Platforms § 144.01-30 First-aid kit. On each manned platform a first-aid kit approved by the Commandant or the U.S. Bureau of Mines shall...

  10. 33 CFR 144.01-30 - First-aid kit.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false First-aid kit. 144.01-30 Section...) OUTER CONTINENTAL SHELF ACTIVITIES LIFESAVING APPLIANCES Manned Platforms § 144.01-30 First-aid kit. On each manned platform a first-aid kit approved by the Commandant or the U.S. Bureau of Mines shall...

  11. 33 CFR 144.01-30 - First-aid kit.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false First-aid kit. 144.01-30 Section...) OUTER CONTINENTAL SHELF ACTIVITIES LIFESAVING APPLIANCES Manned Platforms § 144.01-30 First-aid kit. On each manned platform a first-aid kit approved by the Commandant or the U.S. Bureau of Mines shall...

  12. 33 CFR 3.85-15 - Sector Anchorage: Western Alaska Marine Inspection Zone and Captain of the Port Zones; Marine...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Marine Inspection Zone and Captain of the Port Zones; Marine Safety Unit Valdez: Prince William Sound Marine Inspection and Captain of the Port Zones. 3.85-15 Section 3.85-15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY GENERAL COAST GUARD AREAS, DISTRICTS, SECTORS,...

  13. Telematic Approach to e-Navigation Architecture

    NASA Astrophysics Data System (ADS)

    Weintrit, Adam

    e-Navigation is an IMO (International Maritime Organization) initiative defined as "the harmonised collection, integration, exchange, presentation and analysis of maritime information onboard and ashore by electronic means to enhance berth to berth navigation and related services, for safety and security at sea and protection of the marine environment". In the paper the Author tries to discuss a telematic approach to e-Navigation architecture and stress that for enhancement of safety, security and environmental protection, the decision makers must be supported not only by the technology, but also in a significant way with effective procedures and training.

  14. [Importance of intraoperative navigation in spinal surgery].

    PubMed

    Richter, P H; Gebhard, F; Kraus, M

    2014-10-01

    The number of spinal operations carried out per year is steadily increasing. Pedicle screw placement is the standard procedure for spinal stabilization but can be associated with severe complications. Intraoperative navigation can increase the accuracy of placement of the screws and a decisive role is played by the improvement in imaging devices. Nowadays, 3D-navigation is performed using intraoperative computed tomography or a flatpanel-3D C-arm. Computer navigation is a crucial aid especially for complex deformities or tumor cases. However, as yet no statistically significant reduction of complications could be shown using navigation compared to conventional procedures. With continuing development of intraoperative imaging and navigation it is hoped that screw positioning can be improved further.

  15. A study of navigation in virtual space

    NASA Technical Reports Server (NTRS)

    Darken, Rudy; Sibert, John L.; Shumaker, Randy

    1994-01-01

    In the physical world, man has developed efficient methods for navigation and orientation. These methods are dependent on the high-fidelity stimuli presented by the environment. When placed in a virtual world which cannot offer stimuli of the same quality due to computing constraints and immature technology, tasks requiring the maintenance of position and orientation knowledge become laborious. In this paper, we present a representative set of techniques based on principles of navigation derived from real world analogs including human and avian navigation behavior and cartography. A preliminary classification of virtual worlds is presented based on the size of the world, the density of objects in the world, and the level of activity taking place in the world. We also summarize an informal study we performed to determine how the tools influenced the subjects' navigation strategies and behavior. We conclude that principles extracted from real world navigation aids such as maps can be seen to apply in virtual environments.

  16. Marine envenomations.

    PubMed

    Berling, Ingrid; Isbister, Geoffrey

    2015-01-01

    Marine stings are common but most are minor and do not require medical intervention. Severe and systemic marine envenoming is uncommon, but includes box jellyfish stings, Irukandji syndrome, major stingray trauma and blue-ringed octopus envenoming. Almost all marine injuries are caused by jellyfish stings, and penetrating injuries from spiny fish, stingrays or sea urchins. This article describes the presentation and management of marine envenomations and injuries that may occur in Australia. First aid for jellyfish includes tentacle removal, application of vinegar for box jellyfish, and hot water immersion (45°C for 20 min) for bluebottle jellyfish stings. Basic life support is essential for severe marine envenomings that result in cardiac collapse or paralysis. Irukandji syndrome causes severe generalised pain, autonomic excess and minimal local pain, which may require large amounts of analgesia, and, uncommonly, myocardial depression and pulmonary oedema occur. Penetrating marine injuries can cause significant trauma depending on location of the injury. Large and unclean wounds may have delayed healing and secondary infection if not adequately irrigated, debrided and observed.

  17. 33 CFR 1.05-5 - Marine Safety and Security Council.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Marine Safety and Security... SECURITY GENERAL GENERAL PROVISIONS Rulemaking § 1.05-5 Marine Safety and Security Council. The Marine... Commandant and is the focal point of the Coast Guard regulatory system. The Marine Safety and...

  18. 33 CFR 334.440 - New River, N.C., and vicinity; Marine Corps firing ranges.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... been published in the local notice to mariners and has been broadcast over the Marine Band radio...; Marine Corps firing ranges. 334.440 Section 334.440 Navigation and Navigable Waters CORPS OF ENGINEERS..., N.C., and vicinity; Marine Corps firing ranges. (a) Atlantic Ocean east of New River Inlet....

  19. 33 CFR 1.05-5 - Marine Safety and Security Council.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Marine Safety and Security... SECURITY GENERAL GENERAL PROVISIONS Rulemaking § 1.05-5 Marine Safety and Security Council. The Marine... Commandant and is the focal point of the Coast Guard regulatory system. The Marine Safety and...

  20. 33 CFR 1.05-5 - Marine Safety and Security Council.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Marine Safety and Security... SECURITY GENERAL GENERAL PROVISIONS Rulemaking § 1.05-5 Marine Safety and Security Council. The Marine... Commandant and is the focal point of the Coast Guard regulatory system. The Marine Safety and...

  1. 33 CFR 1.05-5 - Marine Safety and Security Council.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Marine Safety and Security... SECURITY GENERAL GENERAL PROVISIONS Rulemaking § 1.05-5 Marine Safety and Security Council. The Marine... Commandant and is the focal point of the Coast Guard regulatory system. The Marine Safety and...

  2. 33 CFR 1.05-5 - Marine Safety and Security Council.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Marine Safety and Security... SECURITY GENERAL GENERAL PROVISIONS Rulemaking § 1.05-5 Marine Safety and Security Council. The Marine... Commandant and is the focal point of the Coast Guard regulatory system. The Marine Safety and...

  3. 33 CFR 155.4050 - Ensuring that the salvors and marine firefighters are adequate.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... marine firefighters are adequate. 155.4050 Section 155.4050 Navigation and Navigable Waters COAST GUARD... REGULATIONS FOR VESSELS Salvage and Marine Firefighting § 155.4050 Ensuring that the salvors and marine... participation in successful salvage and/or marine firefighting operations, including equipment deployment. (3...

  4. 33 CFR 155.4050 - Ensuring that the salvors and marine firefighters are adequate.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... marine firefighters are adequate. 155.4050 Section 155.4050 Navigation and Navigable Waters COAST GUARD... REGULATIONS FOR VESSELS Salvage and Marine Firefighting § 155.4050 Ensuring that the salvors and marine... participation in successful salvage and/or marine firefighting operations, including equipment deployment. (3...

  5. 33 CFR 155.4050 - Ensuring that the salvors and marine firefighters are adequate.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... marine firefighters are adequate. 155.4050 Section 155.4050 Navigation and Navigable Waters COAST GUARD... REGULATIONS FOR VESSELS Salvage and Marine Firefighting § 155.4050 Ensuring that the salvors and marine... participation in successful salvage and/or marine firefighting operations, including equipment deployment. (3...

  6. 33 CFR 3.35-35 - Sector St. Petersburg Marine Inspection Zone and Captain of the Port Zone.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Sector St. Petersburg Marine Inspection Zone and Captain of the Port Zone. 3.35-35 Section 3.35-35 Navigation and Navigable Waters COAST... ZONES, AND CAPTAIN OF THE PORT ZONES Seventh Coast Guard District § 3.35-35 Sector St. Petersburg Marine...

  7. 33 CFR 3.35-35 - Sector St. Petersburg Marine Inspection Zone and Captain of the Port Zone.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Sector St. Petersburg Marine Inspection Zone and Captain of the Port Zone. 3.35-35 Section 3.35-35 Navigation and Navigable Waters COAST... ZONES, AND CAPTAIN OF THE PORT ZONES Seventh Coast Guard District § 3.35-35 Sector St. Petersburg Marine...

  8. 33 CFR 3.35-35 - Sector St. Petersburg Marine Inspection Zone and Captain of the Port Zone.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Sector St. Petersburg Marine Inspection Zone and Captain of the Port Zone. 3.35-35 Section 3.35-35 Navigation and Navigable Waters COAST... ZONES, AND CAPTAIN OF THE PORT ZONES Seventh Coast Guard District § 3.35-35 Sector St. Petersburg Marine...

  9. 33 CFR 3.35-35 - Sector St. Petersburg Marine Inspection Zone and Captain of the Port Zone.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Sector St. Petersburg Marine Inspection Zone and Captain of the Port Zone. 3.35-35 Section 3.35-35 Navigation and Navigable Waters COAST... ZONES, AND CAPTAIN OF THE PORT ZONES Seventh Coast Guard District § 3.35-35 Sector St. Petersburg Marine...

  10. 33 CFR 334.900 - Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 3 2014-07-01 2014-07-01 false Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area. 334.900 Section 334.900 Navigation and Navigable Waters... REGULATIONS § 334.900 Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area. (a) The...

  11. 33 CFR 334.900 - Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area. 334.900 Section 334.900 Navigation and Navigable Waters... REGULATIONS § 334.900 Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area. (a) The...

  12. 33 CFR 334.900 - Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area. 334.900 Section 334.900 Navigation and Navigable Waters... REGULATIONS § 334.900 Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area. (a) The...

  13. 33 CFR 334.900 - Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area. 334.900 Section 334.900 Navigation and Navigable Waters... REGULATIONS § 334.900 Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area. (a) The...

  14. 33 CFR 334.900 - Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 3 2012-07-01 2012-07-01 false Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area. 334.900 Section 334.900 Navigation and Navigable Waters... REGULATIONS § 334.900 Pacific Ocean, U.S. Marine Corps Base, Camp Pendleton, Calif.; restricted area. (a) The...

  15. 33 CFR 164.72 - Navigational-safety equipment, charts or maps, and publications required on towing vessels.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... the following navigational-safety equipment: (1) Marine radar. By August 2, 1997, a marine radar that... engages in towing on navigable waters of the U.S., including Western Rivers, the radar must meet— (A) The... for Marine Radar Equipment Installed on Ships of Less Than 300 Tons Gross Tonnage, RTCM Paper 71-95...

  16. 33 CFR 164.72 - Navigational-safety equipment, charts or maps, and publications required on towing vessels.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... the following navigational-safety equipment: (1) Marine radar. By August 2, 1997, a marine radar that... engages in towing on navigable waters of the U.S., including Western Rivers, the radar must meet— (A) The... for Marine Radar Equipment Installed on Ships of Less Than 300 Tons Gross Tonnage, RTCM Paper 71-95...

  17. 33 CFR 164.72 - Navigational-safety equipment, charts or maps, and publications required on towing vessels.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... the following navigational-safety equipment: (1) Marine radar. By August 2, 1997, a marine radar that... engages in towing on navigable waters of the U.S., including Western Rivers, the radar must meet— (A) The... for Marine Radar Equipment Installed on Ships of Less Than 300 Tons Gross Tonnage, RTCM Paper 71-95...

  18. 33 CFR 100.130 - Special Local Regulations; Recurring Annual Marine Events in Sector Boston Captain of the Port Zone.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...; Recurring Annual Marine Events in Sector Boston Captain of the Port Zone. 100.130 Section 100.130 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.130 Special Local Regulations; Recurring Annual Marine Events...

  19. 33 CFR 100.1101 - Southern California annual marine events for the San Diego Captain of the Port Zone.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Southern California annual marine... Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.1101 Southern California annual marine events for the San Diego Captain of the...

  20. Inertial Navigation System Aiding Using Vision

    DTIC Science & Technology

    2013-03-01

    are accounted for. Furthermore, in this paper the Kalman Filter’s design is provided and its performance is validated by simulation of the KF action...The design of the Kalman Filter is presented and it is shown that during a long range, wings level cruising flight at constant velocity and altitude, a...8 2.5 The b-frame for Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.6 s-frame for

  1. Aiding GPS With Additional Satellite Navigation Services

    DTIC Science & Technology

    2010-03-01

    10 FDMA Frequency Division Multiple Access . . . . . . . . . . . . . 10 GBCC Ground Based Control Complex . . . . . . . . . . . . . . . 11...Precision Service (HPS), which is like PPS in GPS. GLONASS uses Frequency Division Multiple Access ( FDMA ) unlike the CDMA used in GPS. Every GLONASS...GLONASS uses FDMA , its receiver design is more costly compared to GPS. The GLONASS user segment is small and located primarily in Russia. There are

  2. Performance Enhancements of Ranging Radio Aided Navigation

    DTIC Science & Technology

    2009-03-01

    c22 c23 c31 c32 c33 37775 (2.1) pb = Cbap a (2.2) The DCM has the following properties if used with a right hand Cartesian frame: 1. Det(Cba) Cba...3 F11m = 26666666664 03 I3 03 03 03 CneGC e n 2Cne eieCen (fn) Cnb 03 03 03 (Cne!eie) 03 Cnb 03 03 03 1a I3 03 03 03 03 03 1 b I3 ...represents the distance to the landmark and is found from the z component of yn, pbcam, and s¯ c. d = [yn]z pn+Cnbp b cam z [CnbC b cs ¯ c]z (3.27) Now

  3. Navigational Aids: The Phenomenology of Transformative Learning

    ERIC Educational Resources Information Center

    Mälkki, Kaisu; Green, Larry

    2014-01-01

    Although the notion of transformative learning points to a desirable destination for educational endeavors, the difficulty in the journey is often neglected. Our intention is to map the experiential micro-processes involved in transformative learning such that the phenomenon is illuminated from a first-person rather than third-person point of…

  4. Navigational Aids: The Phenomenology of Transformative Learning

    ERIC Educational Resources Information Center

    Mälkki, Kaisu; Green, Larry

    2014-01-01

    Although the notion of transformative learning points to a desirable destination for educational endeavors, the difficulty in the journey is often neglected. Our intention is to map the experiential micro-processes involved in transformative learning such that the phenomenon is illuminated from a first-person rather than third-person point of…

  5. Simulation Platform for Vision Aided Inertial Navigation

    DTIC Science & Technology

    2014-09-18

    axis at the earth sidereal rate. The x axis projects through the prime meridian at the equator, and the y axis completes the right handed Cartesian...on or near the surface of the Earth is governed by the normal and meridian radii (Noureldin, Karamat, & Georgy, 2013). These radii are also used to... meridian radius, RM, is defined for the north-south direction as shown in Eq (2). RM= a (1-e2) (1-e2 sin2 φ ) 3 2 (2) The rate of change of

  6. Line of Light Aid to Navigation,

    DTIC Science & Technology

    1984-02-01

    1980. 5. Sharf , Bertram, et. al., Experimental Sensory Psychology, Scott, Foresman and Company, Glenview, Illinois, 1975, pp. 240-244. 6. Davy, E., "The...Schiffman, Harvey Richard , Sensation and Perception, John Wile3 Thns, Inc., New York, 1976, p. 190-192. 8. Arecchi, LCDR A. V. and LTJG D. J. Pietraszewski

  7. [Navigation aid through the information overload].

    PubMed

    Günther, Judith; Schindler, Birgit; Suter, Katja

    2014-10-01

    We live in the modern information society. "To be informed" has a crucial impact on the personal, professional, economic and social development. The knowledge of things and their relationships is essential for acute decisions as well as for long-term planning. And at no time it was easier to get the information required within shorter time periods--no matter to whatsoever. The offer of information of the World Wide Web is inexhaustible. This also applies to information about all possible therapeutic and pharmaceutical issues. But is the information found reliable, too? And are easily accessible sources credible? Can we deal with the information overload at these days or do we actually risk paddling only on the surface of the "information-sea", without ever perceiving the actual information depth and width, less to use it? How can we protect being taken in by marketing strategies? The present article describes a structured proceed when seeking literature to find useful medical and pharmaceutical information in a time saving manner.

  8. SMALL CRAFT OPERATION AND NAVIGATION, INSTRUCTOR'S GUIDE.

    ERIC Educational Resources Information Center

    Louisiana State Dept. of Education, Baton Rouge.

    THE MATERIAL IN THIS COURSE IN MARINE NAVIGATION AND SMALL CRAFT OPERATION ON INLAND AND INTERNATIONAL WATERS WAS DEVELOPED BY AN INDIVIDUAL AUTHOR FOR USE IN TRADE SCHOOL PREPARATORY AND EXTENSION CLASSES FOR MALE ADULTS WHO PLAN TO OPERATE BOATS. THE OBJECTIVE IS TO PREPARE THE SMALL BOAT OPERATOR FOR HIS OWN CONTINUATION IN THE STUDY OF…

  9. A microcomputer-based low-cost Omega navigation system

    NASA Technical Reports Server (NTRS)

    Lilley, R. W.; Salter, R. J., Jr.

    1976-01-01

    The application of a low cost, commercially available microcomputer as the navigation processor for a simplified OMEGA navigation system is an area of current research. The interface of a low cost front end OMEGA sensor is described and an example of the phase processing software and navigation routines is given. Emphasis is placed on the description of results obtained with the software version of the OMEGA burst filter known as the memory aided phase locked loop.

  10. Terrestrial navigation based on integrated GPS and INS

    NASA Astrophysics Data System (ADS)

    Ge, Sam S.; Goh, Terence K. L.; Jiang, T. Y.; Koopman, R.; Chan, S. W.; Fong, A. M.

    1998-07-01

    The Global Positioning System (GPS) and Inertial Navigation System (INS) have complimentary features that can be exploited in an integrated system, thus resulting in improved navigation performance. The INS is able to provide accurate aiding data on short-term vehicle dynamics, while the GPS provides accurate data on long-term vehicle dynamics. In this paper, a complete solution is presented for terrestrial navigation based on integrated GPS and INS using Kalman filtering technique.

  11. 75 FR 10687 - Regulated Navigation Areas; Bars Along the Coasts of Oregon and Washington; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-09

    ... of Subjects in 33 CFR Part 165 Harbors, Marine safety, Navigation (water), Reporting and... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA11 Regulated Navigation Areas; Bars Along the Coasts of... establishing regulated navigation areas for bars along the coasts of Oregon and Washington. That...

  12. Vision/INS Integrated Navigation System for Poor Vision Navigation Environments

    PubMed Central

    Kim, Youngsun; Hwang, Dong-Hwan

    2016-01-01

    In order to improve the performance of an inertial navigation system, many aiding sensors can be used. Among these aiding sensors, a vision sensor is of particular note due to its benefits in terms of weight, cost, and power consumption. This paper proposes an inertial and vision integrated navigation method for poor vision navigation environments. The proposed method uses focal plane measurements of landmarks in order to provide position, velocity and attitude outputs even when the number of landmarks on the focal plane is not enough for navigation. In order to verify the proposed method, computer simulations and van tests are carried out. The results show that the proposed method gives accurate and reliable position, velocity and attitude outputs when the number of landmarks is insufficient. PMID:27754350

  13. Vision/INS Integrated Navigation System for Poor Vision Navigation Environments.

    PubMed

    Kim, Youngsun; Hwang, Dong-Hwan

    2016-10-12

    In order to improve the performance of an inertial navigation system, many aiding sensors can be used. Among these aiding sensors, a vision sensor is of particular note due to its benefits in terms of weight, cost, and power consumption. This paper proposes an inertial and vision integrated navigation method for poor vision navigation environments. The proposed method uses focal plane measurements of landmarks in order to provide position, velocity and attitude outputs even when the number of landmarks on the focal plane is not enough for navigation. In order to verify the proposed method, computer simulations and van tests are carried out. The results show that the proposed method gives accurate and reliable position, velocity and attitude outputs when the number of landmarks is insufficient.

  14. Real-Time GPS-Alternative Navigation Using Commodity Hardware

    DTIC Science & Technology

    2007-06-01

    Hypothesis The thrust of this research was to improve a state-of-the- art image-aided inertial navigation system developed in previous research at AFIT...novel, and even now is state-of-the- art GPS-alternative navigation. The previous system was built to test and demonstrate image-aided inertial...of-the- art . There have been a few attempts to augment CPU-based image processing by using programmable hardware. The objective of this type of

  15. Navigation for space shuttle approach and landing using an inertial navigation system augmented by data from a precision ranging system or a microwave scan beam landing guidance system

    NASA Technical Reports Server (NTRS)

    Mcgee, L. A.; Smith, G. L.; Hegarty, D. M.; Merrick, R. B.; Carson, T. M.; Schmidt, S. F.

    1970-01-01

    A preliminary study has been made of the navigation performance which might be achieved for the high cross-range space shuttle orbiter during final approach and landing by using an optimally augmented inertial navigation system. Computed navigation accuracies are presented for an on-board inertial navigation system augmented (by means of an optimal filter algorithm) with data from two different ground navigation aids; a precision ranging system and a microwave scanning beam landing guidance system. These results show that augmentation with either type of ground navigation aid is capable of providing a navigation performance at touchdown which should be adequate for the space shuttle. In addition, adequate navigation performance for space shuttle landing is obtainable from the precision ranging system even with a complete dropout of precision range measurements as much as 100 seconds before touchdown.

  16. Interplanetary approach optical navigation with applications

    NASA Technical Reports Server (NTRS)

    Jerath, N.

    1978-01-01

    The use of optical data from onboard television cameras for the navigation of interplanetary spacecraft during the planet approach phase is investigated. Three optical data types were studied: the planet limb with auxiliary celestial references, the satellite-star, and the planet-star two-camera methods. Analysis and modelling issues related to the nature and information content of the optical methods were examined. Dynamic and measurement system modelling, data sequence design, measurement extraction, model estimation and orbit determination, as relating optical navigation, are discussed, and the various error sources were analyzed. The methodology developed was applied to the Mariner 9 and the Viking Mars missions. Navigation accuracies were evaluated at the control and knowledge points, with particular emphasis devoted to the combined use of radio and optical data. A parametric probability analysis technique was developed to evaluate navigation performance as a function of system reliabilities.

  17. Testing Microwave Landing Systems With Satellite Navigation

    NASA Technical Reports Server (NTRS)

    Kiriazes, John J.

    1990-01-01

    Less time and equipment needed to perform tests. Satellite-based Global Positioning System (GPS) measures accuracy of microwave scanning-beam landing system (MSBLS) at airports used to support Shuttle landings. Provides time and three-dimensional information on position and velocity with unprecedented accuracy. Useful for testing other electronic navigation aids like LORAN, TACAN and microwave landing systems (MLS).

  18. Bayesian statistics and information fusion for GPS-denied navigation

    NASA Astrophysics Data System (ADS)

    Copp, Brian Lee

    It is well known that satellite navigation systems are vulnerable to disruption due to jamming, spoofing, or obstruction of the signal. The desire for robust navigation of aircraft in GPS-denied environments has motivated the development of feature-aided navigation systems, in which measurements of environmental features are used to complement the dead reckoning solution produced by an inertial navigation system. Examples of environmental features which can be exploited for navigation include star positions, terrain elevation, terrestrial wireless signals, and features extracted from photographic data. Feature-aided navigation represents a particularly challenging estimation problem because the measurements are often strongly nonlinear, and the quality of the navigation solution is limited by the knowledge of nuisance parameters which may be difficult to model accurately. As a result, integration approaches based on the Kalman filter and its variants may fail to give adequate performance. This project develops a framework for the integration of feature-aided navigation techniques using Bayesian statistics. In this approach, the probability density function for aircraft horizontal position (latitude and longitude) is approximated by a two-dimensional point mass function defined on a rectangular grid. Nuisance parameters are estimated using a hypothesis based approach (Multiple Model Adaptive Estimation) which continuously maintains an accurate probability density even in the presence of strong nonlinearities. The effectiveness of the proposed approach is illustrated by the simulated use of terrain referenced navigation and wireless time-of-arrival positioning to estimate a reference aircraft trajectory. Monte Carlo simulations have shown that accurate position estimates can be obtained in terrain referenced navigation even with a strongly nonlinear altitude bias. The integration of terrain referenced and wireless time-of-arrival measurements is described along with

  19. Mars rover local navigation and hazard avoidance

    NASA Technical Reports Server (NTRS)

    Wilcox, B. H.; Gennery, D. B.; Mishkin, A. H.

    1989-01-01

    A Mars rover sample return mission has been proposed for the late 1990's. Due to the long speed-of-light delays between earth and Mars, some autonomy on the rover is highly desirable. JPL has been conducting research in two possible modes of rover operation, Computer-Aided Remote Driving and Semiautonomous Navigation. A recently-completed research program used a half-scale testbed vehicle to explore several of the concepts in semiautonomous navigation. A new, full-scale vehicle with all computational and power resources on-board will be used in the coming year to demonstrate relatively fast semiautonomous navigation. The computational and power requirements for Mars rover local navigation and hazard avoidance are discussed.

  20. 76 FR 76070 - Proposed Modification of Area Navigation Route T-288; WY

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-06

    ... Federal Aviation Administration 14 CFR Part 71 Proposed Modification of Area Navigation Route T-288; WY...: This action proposes to modify low altitude area navigation (RNAV) route T-288 by extending the route... airway structure and providing alternative routing in the event of navigation aid (NAVAID) outages....

  1. 76 FR 2916 - Houston/Galveston Navigation Safety Advisory Committee; Meetings

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-18

    ... SECURITY Coast Guard Houston/Galveston Navigation Safety Advisory Committee; Meetings AGENCY: Coast Guard, DHS. ACTION: Notice of Meetings. SUMMARY: The Houston/Galveston Navigation Safety Advisory Committee... to discuss waterway improvements, aids to navigation, area projects impacting safety on the...

  2. 77 FR 65253 - Amendment of Area Navigation Route T-240; AK

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-26

    ... Administration 14 CFR Part 71 RIN 2120-AA66 Amendment of Area Navigation Route T-240; AK AGENCY: Federal Aviation... description of area navigation (RNAV) route T-240 in Alaska by removing one waypoint that is no longer... route description is amended to include the names of the navigation aids that comprise the route....

  3. An Agent-Based Model for Navigation Simulation in a Heterogeneous Environment

    ERIC Educational Resources Information Center

    Shanklin, Teresa A.

    2012-01-01

    Complex navigation (e.g. indoor and outdoor environments) can be studied as a system-of-systems problem. The model is made up of disparate systems that can aid a user in navigating from one location to another, utilizing whatever sensor system or information is available. By using intelligent navigation sensors and techniques (e.g. RFID, Wifi,…

  4. An Agent-Based Model for Navigation Simulation in a Heterogeneous Environment

    ERIC Educational Resources Information Center

    Shanklin, Teresa A.

    2012-01-01

    Complex navigation (e.g. indoor and outdoor environments) can be studied as a system-of-systems problem. The model is made up of disparate systems that can aid a user in navigating from one location to another, utilizing whatever sensor system or information is available. By using intelligent navigation sensors and techniques (e.g. RFID, Wifi,…

  5. 77 FR 30883 - Amendment of Area Navigation (RNAV) Route Q-130; UT

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-24

    ... Part 71 [Docket No. FAA-2012-0438; Airspace Docket No. 11-AWP-20]; Amendment of Area Navigation (RNAV... editorial changes to the Q-130 description that spells out the names of navigation aids, and adds state... procedures and air navigation, it is certified that this rule, when promulgated, will not have a significant...

  6. 77 FR 65461 - Amendment of Area Navigation Route Q-1; CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-29

    ... Area Navigation Route Q-1; CA AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; technical amendment. SUMMARY: This action amends the legal description of area navigation (RNAV) route Q-1... Reyes, CA, navigation aid, and listing of the points in the proper order. DATES: Effective Date: 0901...

  7. 33 CFR 3.40-65 - Sector Ohio Valley Marine Inspection Zone and Captain of the Port Zone; Marine Safety Unit...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Sector Ohio Valley Marine Inspection Zone and Captain of the Port Zone; Marine Safety Unit Pittsburgh. 3.40-65 Section 3.40-65..., DISTRICTS, SECTORS, MARINE INSPECTION ZONES, AND CAPTAIN OF THE PORT ZONES Eighth Coast Guard District §...

  8. 33 CFR 3.40-15 - Sector New Orleans Marine Inspection Zone and Captain of the Port Zone; Marine Safety Unit Morgan...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Sector New Orleans Marine Inspection Zone and Captain of the Port Zone; Marine Safety Unit Morgan City. 3.40-15 Section 3.40-15..., DISTRICTS, SECTORS, MARINE INSPECTION ZONES, AND CAPTAIN OF THE PORT ZONES Eighth Coast Guard District §...

  9. Marine and maritime uses

    NASA Technical Reports Server (NTRS)

    1975-01-01

    Activities related to: (1) understanding, controlling, and using the ocean's biological and physical processes for food and energy production and ship design purposes, and (2) providing navigation, communication, and data transmission technological aids which improve efficiency and enhance safety in maritime operations are disclosed.

  10. 33 CFR 3.55-10 - Sector Los Angeles-Long Beach Marine Inspection Zone and Captain of the Port Zone.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Sector Los Angeles-Long Beach Marine Inspection Zone and Captain of the Port Zone. 3.55-10 Section 3.55-10 Navigation and Navigable...-Long Beach Marine Inspection Zone and Captain of the Port Zone. Sector Los Angeles-Long Beach's (LA-LB...

  11. Institute of Navigation, Annual Meeting, 47th, Williamsburg, VA, June 10-12, 1991, Proceedings

    NASA Astrophysics Data System (ADS)

    1991-11-01

    The present volume of navigation and exploration discusses space exploration, mapping and geodesy, aircraft navigation, undersea navigation, land and vehicular location, international and legal aspects of navigation, the history of navigation technology and applications, Loran development and implementation, GPS and GLONASS developments, and search and rescue. Topics addressed include stabilization of low orbiting spacecraft using GPS, the employment of laser navigation for automatic rendezvous and docking systems, enhanced pseudostatic processing, and the expanding role of sensor fusion. Attention is given to a gravity-aided inertial navigation system, recent developments in aviation products liability and navigation, the ICAO future air navigation system, and Loran's implementation in NAS. Also discussed are Inmarsat integrated navigation/communication activities, the GPS program status, the evolution of military GPS technology into the Navcore V receiver engine, and Sarsat location algorithms.

  12. 14 CFR 151.13 - Federal-aid Airport Program: Policy affecting landing aid requirements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... navigational aids; (c) Airport environmental factors such as local weather conditions and adjacent geographic... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Federal-aid Airport Program: Policy... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS General...

  13. Do Sign Language Videos Improve Web Navigation for Deaf Signer Users?

    ERIC Educational Resources Information Center

    Fajardo, Inmaculada; Parra, Elena; Canas, Jose J.

    2010-01-01

    The efficacy of video-based sign language (SL) navigation aids to improve Web search for Deaf Signers was tested by two experiments. Experiment 1 compared 2 navigation aids based on text hyperlinks linked to embedded SL videos, which differed in the spatial contiguity between the text hyperlink and SL video (contiguous vs. distant). Deaf Signers'…

  14. 33 CFR 164.38 - Automatic radar plotting aids (ARPA).

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Automatic radar plotting aids... plotting aids (ARPA). (a) The following definitions are used in this section— Bulk means material in any... Radar Plotting Aids” (Appendix A), and that has both audible and visual alarms, must be installed...

  15. 33 CFR 100.35T05-0276 - Special Local Regulations for Marine Events; Potomac River, National Harbor Access Channel, MD.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Marine Events; Potomac River, National Harbor Access Channel, MD. 100.35T05-0276 Section 100.35T05-0276 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.35T05-0276 Special Local Regulations for Marine Events;...

  16. 33 CFR 100.1103 - Northern California annual marine events.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... events. 100.1103 Section 100.1103 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND... annual marine events. (a) General. Special local regulations are established for the events listed in... Eleventh Coast Guard District in the Local Notice to Mariners at least 20 days prior to each event. To...

  17. 33 CFR 100.1103 - Northern California annual marine events.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... events. 100.1103 Section 100.1103 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND... annual marine events. (a) General. Special local regulations are established for the events listed in... Eleventh Coast Guard District in the Local Notice to Mariners at least 20 days prior to each event. To...

  18. Astronomical Methods in Aerial Navigation

    NASA Technical Reports Server (NTRS)

    Beij, K Hilding

    1925-01-01

    The astronomical method of determining position is universally used in marine navigation and may also be of service in aerial navigation. The practical application of the method, however, must be modified and adapted to conform to the requirements of aviation. Much of this work of adaptation has already been accomplished, but being scattered through various technical journals in a number of languages, is not readily available. This report is for the purpose of collecting under one cover such previous work as appears to be of value to the aerial navigator, comparing instruments and methods, indicating the best practice, and suggesting future developments. The various methods of determining position and their application and value are outlined, and a brief resume of the theory of the astronomical method is given. Observation instruments are described in detail. A complete discussion of the reduction of observations follows, including a rapid method of finding position from the altitudes of two stars. Maps and map cases are briefly considered. A bibliography of the subject is appended.

  19. 33 CFR 3.70-20 - Activities Far East Marine Inspection Zone.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Activities Far East Marine... SECURITY GENERAL COAST GUARD AREAS, DISTRICTS, SECTORS, MARINE INSPECTION ZONES, AND CAPTAIN OF THE PORT ZONES Fourteenth Coast Guard District § 3.70-20 Activities Far East Marine Inspection Zone....

  20. 33 CFR 1.01-20 - Officer in Charge, Marine Inspection.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... action in cases of misconduct, negligence, or incompetence of merchant marine officers or seamen; and the... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Officer in Charge, Marine... SECURITY GENERAL GENERAL PROVISIONS Delegation of Authority § 1.01-20 Officer in Charge, Marine...