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Deck · 2,639 questions

General Navigation - USCG Exam Questions

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 General Navigation questions

Questions 1,601–1,700 of 2,639 · page 17 of 27

  1. #1719 A correction for augmentation is included in the Nautical Almanac corrections for __________.
  2. #1720 Apparent altitude is sextant altitude corrected for __________.
  3. #1721 When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.
  4. #1723 When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reference level and __________.
  5. #1724 A vessel is proceeding downstream in a narrow channel on the Western Rivers when another vessel is sighted moving upstream. Which vessel has the right...
  6. #1725 The distance in miles between the circle of equal altitude for the observed altitude (Ho) and the circle of equal altitude for the computed altitude (...
  7. #1726 The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time...
  8. #1727 The equation of time is 8m 40s. The apparent Sun is ahead of the mean Sun. If you are on the central meridian of your time zone, the apparent Sun will...
  9. #1728 When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine __________.
  10. #1729 The primary use of apparent time in marine navigation is to __________.
  11. #1730 The equation of time measures the __________.
  12. #1731 Apparent time is based on __________.
  13. #1732 What is the equivalent of 0°48' in time units?
  14. #1733 The standard time meridian for zone description -12 is __________.
  15. #1734 What is the equivalent of 23 min. 20 sec. in arc units?
  16. #1735 A ship is in longitude 54°00'W on a true course of 270°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed...
  17. #1736 What is the equivalent of 10 min. 52 sec. in arc units?
  18. #1737 What is the equivalent of 0 min. 16 sec. in arc units?
  19. #1738 What is the equivalent of 5°54' in time units?
  20. #1740 What is the equivalent of 47 min. 20 sec. in arc units?
  21. #1741 What is the equivalent of 42 min. 48 sec. in arc units?
  22. #1742 With respect to the vernal equinox, what is the length of the year?
  23. #1743 A sidereal day is shorter than a solar day. This difference is due to __________.
  24. #1744 A sidereal day is approximately how much shorter than a solar day?
  25. #1745 The lunar day is __________.
  26. #1746 Sidereal time is NOT used __________.
  27. #1747 Universal time (UTI) is another name for __________.
  28. #1748 Local sidereal time is equal to the __________.
  29. #1749 The tropical year differs from which year by 20 minutes?
  30. #1750 The standard meridian for the time zone +1 is __________.
  31. #1751 The standard time meridian for zone description -1 is __________.
  32. #1752 The dividing meridian between zone descriptions -2 and -3 is __________.
  33. #1754 The dividing meridian between zone descriptions +7 and +8 is __________.
  34. #1755 The dividing meridian between zone descriptions +4 and +5 is __________.
  35. #1756 A ship is in longitude 54°00'W on a true course of 090°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed...
  36. #1757 The standard time meridian for description +12 is __________.
  37. #1758 The dividing meridian between zone descriptions -7 and -8 is __________.
  38. #1759 The dividing meridian between zone descriptions -10 and -11 is __________.
  39. #1760 The sidereal day begins __________.
  40. #1761 Your longitude is 179°59'W. The LMT at this longitude is 23h 56m of the 4th day of the month. Six minutes later your position is 179°59'E longitude. Y...
  41. #1763 The LMT of sunrise on the standard meridian is 0552. Your longitude is 99°15'E. What is your ZT of sunrise?
  42. #1765 The change in the length of day becomes greater as latitude increases because of the __________.
  43. #1766 Which condition exists at the summer solstice in the Northern Hemisphere?
  44. #1767 The mean sun used to measure time moves __________.
  45. #1769 Daylight savings time is a form of zone time that adopts the time __________.
  46. #1770 Which statement(s) is/are TRUE concerning radio equipment on towing vessels of 26 feet or more in length?
  47. #1773 When the owner or Master inspects his/her towing vessel before embarking on a voyage of more than 24 hours, he/she must check all terminal gear EXCEPT...
  48. #1774 Your vessel will be entering the navigable waters of the United States. You are required by regulations to __________.
  49. #1777 The term "Western Rivers," when it refers to regulations requiring towing vessels to carry navigational-safety equipment, charts or maps, and publicat...
  50. #1778 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...
  51. #1779 A facility used for the discharge of a cargo of a particular hazard, such as chlorine, butane or ethane, must have what to warn water traffic of an im...
  52. #1781 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...
  53. #1782 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...
  54. #1783 The altitude at LAN may be observed by starting several minutes in advance and continuing until a maximum altitude occurs. This procedure should not b...
  55. #1784 When taking an amplitude, the Sun's center should be observed on the visible horizon when __________.
  56. #1785 An amplitude of the Sun in high latitudes __________.
  57. #1786 What is the geographic longitude of a body whose GHA is 232°27'?
  58. #1787 A position on the Earth has a longitude of 74°10'E. Its celestial counterpart would have a __________.
  59. #1788 The line of position determined from a sight with an observed altitude (Ho) of 88°45.0' should be __________.
  60. #1789 The GP of a body for a high altitude sight is determined from the declination and the __________.
  61. #1790 The center of a circle of equal altitude, plotted on the surface of the Earth, is the __________.
  62. #1791 The GP of a body for a high altitude sight is determined from the declination and the __________.
  63. #1792 What is the major advantage of high altitude observations?
  64. #1794 A nautical mile is a distance of approximately how much greater than or less than a statute mile?
  65. #1796 You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse?
  66. #1797 You are on course 344°T and take a relative bearing of a lighthouse of 270°. What is the true bearing to the lighthouse?
  67. #1798 At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position and it is 0.5 mile east of your DR. Which statement is...
  68. #1799 At 0000 you fix your position and change course to 090°T. At 0030 you again fix your position and it is 0.5 mile east of your DR. Which statement is T...
  69. #1800 Which statement concerning current is TRUE?
  70. #1801 Which error is NOT included in the term "current" when used in relation to a fix?
  71. #1802 You are proceeding up a channel at night. It is marked by a range which bears 185°T. You steady up on a compass course of 180° with the range in line...
  72. #1803 A dead reckoning (DR) plot __________.
  73. #1804 A dead reckoning (DR) plot __________.
  74. #1805 The paths of intended travel between three or more points is the __________.
  75. #1806 The direction in which a vessel should be steered between two points is the __________.
  76. #1807 The direction a vessel is pointed at any given time is the __________.
  77. #1808 The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the point of arrival, is the _____...
  78. #1809 In illustration D051NG below, why was the position labeled "E" plotted? illustration
  79. #1810 In illustration D051NG below what is indicated by the position labeled "C"? illustration
  80. #1811 In illustration D051NG below, why was the position labeled "C" plotted? illustration
  81. #1812 In illustration D051NG below, why was the position labeled "D" plotted? illustration
  82. #1813 You should plot your dead reckoning position __________.
  83. #1814 Your dead reckoning position should be plotted __________.
  84. #1816 A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.
  85. #1817 You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.
  86. #1818 A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.
  87. #1819 Which position includes the effects of wind and current?
  88. #1820 You are running parallel to the coast and plotting running fixes using bearings of the same object. You are making more speed than assumed for the run...
  89. #1821 You are plotting a running fix. The LOP to be run forward is an arc from a radar range, what technique should be used?
  90. #1822 A chart position enclosed by a square is a(n) __________.
  91. #1823 You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
  92. #1824 A single line of position combined with a dead-reckoning position results in a(n) __________.
  93. #1826 A line connecting all possible positions of your vessel at any given time is a __________.
  94. #1827 A line of position formed by sighting two charted objects in line is called a(n) __________.
  95. #1829 A radar range to a small, charted object such as a light will provide a line of position in which form?
  96. #1830 You take a bearing of 264° of a lighthouse. What bearing of another object would give the best fix?
  97. #1831 You take a bearing of 176° of a lighthouse. Which bearing of another object would give the best fix?
  98. #1832 You take a bearing of 176° of a lighthouse. What bearing of another object would give the best fix?
  99. #1833 You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?
  100. #1834 You take a bearing of 356° of a lighthouse. Which bearing of another object would give the best fix?

General Navigation questions: what to expect

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

There are 2,639 General Navigation questions on this site, every one released by the U.S. Coast Guard or taken from the National Maritime Center's sample examinations, with its correct answer. The exam draws its General Navigation module from the same pool.

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.