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Expired / General Navigation
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Deck · 146 questions

Expired / General Navigation - USCG Exam Questions

These are retired questions the Coast Guard no longer draws exams from. They stay online for reference; the current questions are in General Navigation.

Chart reading, the U.S. Aids to Navigation System, compass error, tides and currents, and the standard navigation publications.

Every question below is a real U.S. Coast Guard exam question with four choices. Answer one and the correct choice is revealed instantly, with the USCG reference and illustration where the question uses one.

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All Expired / General Navigation questions

Questions 101–146 of 146 · page 2 of 2

  1. #1560 The point on the celestial sphere that is directly below an observer is the __________.
  2. #1564 Which publication(s) must a towing vessel of 12 meters or more in length carry when operating on US waters other than the Western Rivers?
  3. #1569 Which navigational equipment is required to be tested and logged before a towing vessel embarks on a voyage of more than 24 hours?
  4. #1576 A true bearing of a charted object, when plotted on a chart, will establish a __________.
  5. #1577 A vessel is steaming in east longitude on January 25 and crosses the International Date Line on an eastbound course at 0900 zone time. What is the dat...
  6. #1592 The LMT of LAN is 1210. Your longitude is 70°30'E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at L...
  7. #1641 A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.
  8. #1643 The owner or Master of a towing vessel must ensure that each person that directs and controls the movement of the vessel knows all of the following EX...
  9. #1667 The difference of latitude (l) between the geographic position (GP) of a celestial body and your position, at the time of upper transit, is represente...
  10. #1674 In the horizon system of coordinates what is the equivalent to the celestial equator of the celestial equator system?
  11. #1685 Which instrument may a towing vessel, engaged in towing exclusively on the Western Rivers, use in place of a magnetic compass?
  12. #1694 On March 17, at 0500 zone time, you cross the 180th meridian steaming eastward to west longitude. What is your local time?
  13. #1696 You are on course 355°T and take a relative bearing of a lighthouse of 275°. What is the true bearing of the lighthouse?
  14. #1703 A time diagram is a diagram of the celestial sphere as observed from above the __________.
  15. #1709 An azimuth angle for a body is measured from the __________.
  16. #1710 You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You see an emergency rotating flashing light o...
  17. #1714 The diameter of the Sun and Moon as seen from the Earth varies slightly but averages about __________.
  18. #1717 Where do you find the semidiameter correction to be used to correct sextant observations of the stars?
  19. #1722 When correcting apparent altitude to observed altitude, you do NOT apply a correction for __________.
  20. #1739 On November 1st the zone time is 1700 EST (ZD +5) in LONG 75°W. What is the corresponding zone time and date in LONG 135°E?
  21. #1753 You are in LONG 165°E, zone time at 0400, 1 November. What is the zone time and date in LONG 165°W?
  22. #1762 The difference in local time between an observer on 114°W and one on 119°W is __________.
  23. #1764 The Local mean time of LAN is 1152. Your longitude is 73°15'E. What time would you use to enter the Nautical Almanac to determine the declination of t...
  24. #1768 A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?
  25. #1771 Which piece of navigational safety equipment is NOT required on towing vessels over 12 meters in length, provided that the vessel remains within the n...
  26. #1772 The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place and are logged __________.
  27. #1775 A power-driven vessel operating in a narrow channel with a following current, on the Western Rivers, is meeting an upbound vessel. Which statement is...
  28. #1776 You are in charge of a power-driven vessel crossing a river on the Western Rivers. You must keep out of the way of __________.
  29. #1780 Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to...
  30. #1793 At evening stars, the first stars that should be observed are those with an azimuth in what quadrant?
  31. #1795 You are on course 222°T and take a relative bearing of a lighthouse of 025°. What is the true bearing to the lighthouse?
  32. #1815 You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?
  33. #1825 A position obtained by taking lines of position from one object at different times and advancing them to a common time is a(n) __________.
  34. #1828 A line of position derived by radar range from an identified point on a coast will be a(n) __________.
  35. #1836 You take a bearing of 086° of a lighthouse. Which bearing of another object would give the best fix?
  36. #1844 You are inbound in a channel marked by a range. The range line is 040°T. You are steering 036°T. The range is in sight as shown in illustration D047NG... illustration
  37. #1845 You are inbound in a channel marked by a range. The range line is 216°T. You are steering 213°T and have the range in sight as shown in illustration D... illustration
  38. #1846 You are inbound in a channel marked by a range. The range line is 133°T. You are steering 129°T and have the range in sight as shown in illustration D... illustration
  39. #1850 You are on course 355°T and take a relative bearing of a lighthouse of 275°. What is the true bearing of the lighthouse?
  40. #1917 The latitude of the upper vertex of a great circle is 36°N. What is the latitude of the lower vertex?
  41. #1918 A great circle crosses the equator at 141°E. It will also cross the equator at what other longitude?
  42. #1953 What current flows southward along the west coast of the United States and causes extensive fog in that area?
  43. #1954 Which current would you encounter on a direct passage from southern Africa to Argentina, South America?
  44. #1956 Which ocean current is "warm" based on the latitude in which it originates and on the effect it has on climate?
  45. #1961 Which current would you encounter on a direct passage from London, England, to Cape Town, South Africa?
  46. #1965 Information about the direction and velocity of rotary tidal currents is found in the __________.

General Navigation questions: what to expect

Q How many General Navigation questions are in the Deck pool?

This retired set holds 146 General Navigation questions the Coast Guard no longer draws on exams. They stay online for reference; the current General Navigation module is the one to study.

Q What score do I need to pass the General Navigation module?

Most USCG exam modules, including General Navigation, require 70 percent to pass. Rules of the Road modules require 90 percent.

Q Are these the real USCG General Navigation exam questions?

Yes. They are the published U.S. Coast Guard questions, matched to the National Maritime Center's 2026 sample examinations. Answer any question to see the correct choice, the USCG reference and the illustration where the question uses one.

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About the Deck question pool

The Deck pool holds the current U.S. Coast Guard questions for every deck credential, from Able Seaman and the OUPV six-pack up to unlimited Master. Each question is multiple choice with four options, graded instantly, with the USCG reference shown where one exists.