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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 1,701–1,800 of 2,639 · page 18 of 27

  1. #1835 You take a bearing of 313° and 076° of two objects. Which bearing of a third object will give the best fix?
  2. #1837 You take a bearing of 191° and 313° to two objects. Which bearing of a third object will give the best fix?
  3. #1838 You take a bearing of 142° and 259° of two objects. What bearing of a third object will give the best fix?
  4. #1839 You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?
  5. #1840 You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?
  6. #1841 You take bearings of 313°T and 076°T on two objects. Which bearing of a third object will give the best fix?
  7. #1842 You are outbound in a channel marked by a range astern. The range line is 309°T. You are steering 127°T and have the range in sight as shown in illust... illustration
  8. #1843 You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown in illustration D... illustration
  9. #1847 You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, wh... illustration
  10. #1848 Your vessel is entering port when you change course and steady up on a range with the lights in line. After a few minutes you observe the range lights... illustration
  11. #1849 Your vessel is entering port and you have steadied up on a range, dead ahead, in line with your keel. After a few minutes the range, still dead ahead,... illustration
  12. #1851 You are on course 222°T and take a relative bearing of a lighthouse of 025°. What is the true bearing to the lighthouse?
  13. #1852 You are on course 357°T and take a relative bearing of a lighthouse of 180°. What is the true bearing to the lighthouse?
  14. #1853 You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse?
  15. #1854 You are on course 344°T and take a relative bearing of a lighthouse of 270°. What is the true bearing to the lighthouse?
  16. #1855 You are on course 344°T and take a relative bearing of a lighthouse of 090°. What is the true bearing to the lighthouse?
  17. #1856 You are on course 027°T and take a relative bearing to a lighthouse of 220°. What is the true bearing to the lighthouse?
  18. #1857 A relative bearing is always measured from __________.
  19. #1858 What is the relative bearing of an object sighted dead ahead?
  20. #1859 What is the relative bearing of an object broad on the starboard beam?
  21. #1860 What is the relative bearing of an object broad on the port quarter?
  22. #1861 What is the relative bearing of an object on the port beam?
  23. #1862 You are on course 030°T. The relative bearing of a lighthouse is 45°. What is the true bearing?
  24. #1863 You are underway in a vessel with a draft of 7.0 feet (2.1 meters). The charted depth for your position is 9 fathoms. You compute the height of tide t...
  25. #1864 You are underway in a vessel with a draft of 6.0 feet. You are in an area where the charted depth of the water is 4 fathoms. You would expect the dept...
  26. #1865 When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation?
  27. #1866 When making landfall at night, the light from a powerful lighthouse may sometimes be seen before the lantern breaks the horizon. This light is called...
  28. #1867 If several navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what agains...
  29. #1868 When using a buoy as an aid to navigation which of the following should be considered?
  30. #1869 When should a navigator rely on the position of floating aids to navigation?
  31. #1870 When navigating a vessel, you __________.
  32. #1871 When you are steering on a pair of range lights and find the upper light is in line above the lower light, you should __________.
  33. #1872 When you are steering on a pair of range lights and find the upper light is above the lower light you should __________.
  34. #1873 When you are steering on a pair of range lights and find the upper light is above the lower light you should __________.
  35. #1874 A section of the river that is narrower than usual and is often navigable from bank to bank is a __________.
  36. #1875 A bluff bar is a bar __________.
  37. #1876 A bold reef is a reef __________.
  38. #1877 A structure, usually made of stone, or cement pilings, which extends from the bank at approximately right angles to the current is called a __________...
  39. #1878 A tow that is properly aligned to pass through a narrow opening between two bridge piers is "__________".
  40. #1879 The abbreviation L.W.R.P. on the navigation maps means __________.
  41. #1880 You are ascending a river and exchanging navigational information via radiotelephone with a descending vessel. If the descending vessel advises you to...
  42. #1881 The place where a channel moves from along one bank of the river over to the other bank of the river is called a __________.
  43. #1882 A current moving across a lock entrance toward the river or toward the dam is called a(n) __________.
  44. #1883 The controlling depth of the river is __________.
  45. #1884 The "head of the bend" is the __________.
  46. #1885 What term is used to describe a river barge designed to carry coal or any similar cargo not requiring weather protection?
  47. #1886 What term is used to describe a tank barge constructed with the structural framing inside the cargo tank and the side shell plating containing the car...
  48. #1887 When one upbound vessel is overtaking another vessel and both are pushing a tow ahead, what reaction may you expect?
  49. #1888 When pushing a tow and approaching barges tied off to the shore, you should __________.
  50. #1889 You are pushing a tow ahead and passing close to another towboat which is pushing ahead in the same direction (you are overtaking). After the towheads...
  51. #1890 A towboat has the same draft as the barges it is pushing ahead. If the distance from the stern of the towboat to the head of the tow is 800 feet, wher...
  52. #1891 Where is the pivot point of a towboat with a tow ahead?
  53. #1892 When steering a tow downstream around the shape of a sand bar, and staying on the proper side of the buoys, an operator should be cautious of ________...
  54. #1893 The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through. What should you be most concerned with?
  55. #1894 What is used to help prevent damage to barges, locks, and landings when you are locking or landing a tow?
  56. #1895 A line of position from a celestial observation is a segment of a __________.
  57. #1896 You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?
  58. #1897 You are on course 042°T. To check the course of your vessel you should observe a celestial body on which bearing?
  59. #1898 You are on course 146°T. To check the speed of your vessel you should observe a celestial body on which bearing?
  60. #1899 You are on course 201°T. To check the speed of your vessel you should observe a celestial body on which bearing?
  61. #1900 You are on course 238°T. To check the course of your vessel you should observe a celestial body on which bearing?
  62. #1901 You are on course 303°T. To check the speed of your vessel you should observe a celestial body on which bearing?
  63. #1902 You are on course 061°T. To check the longitude of your vessel you should observe a celestial body on which bearing?
  64. #1903 You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown in illustration D... illustration
  65. #1904 A latitude line will be obtained by observing a body __________.
  66. #1905 While steering a course of 150°T, you wish to observe a body for a latitude check. What would the azimuth have to be?
  67. #1906 While steering a course of 150°T, you wish to observe the Sun for a speed check. What would the azimuth have to be?
  68. #1907 A star is observed at lower transit. The line of position derived from this sight is __________.
  69. #1908 You are on course 138°T. To check the latitude of your vessel you should observe a celestial body on which bearing?
  70. #1909 What is NOT an advantage of the rhumb line track over a great circle track?
  71. #1910 What is the major advantage of a rhumb line track?
  72. #1911 When is the rhumb line distance the same as the great circle distance?
  73. #1912 In which voyage, between two points, is the rhumb line distance NOT approximately the same as the great circle distance?
  74. #1913 What is a characteristic of a rhumb line?
  75. #1914 A great circle track provides the maximum saving in distance on __________.
  76. #1915 The shortest distance between any two points on earth defines a __________.
  77. #1916 What defines a great circle?
  78. #1919 A great circle crosses the equator at 162°E. It will also cross the equator at what other longitude?
  79. #1920 A great circle crosses the equator at 134°E. It will also cross the equator at what other longitude?
  80. #1921 A great circle crosses the equator at 127°W. It will also cross the equator at what other longitude?
  81. #1922 A great circle crosses the equator at 93°W. It will also cross the equator at what other longitude?
  82. #1923 A great circle crosses the equator at 17°W. It will also cross the equator at what other longitude?
  83. #1924 A great circle crosses the equator at 157°W. It will also cross the equator at what other longitude?
  84. #1925 The distance to the nearest vertex from any point on a great circle track cannot exceed __________.
  85. #1926 The vertex of a great circle track is in LONG 109°E. An eastbound vessel would cross the equator in LONG __________.
  86. #1927 The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, the great circle track will cross the equator in LONG __________.
  87. #1928 The distance in longitude from the intersection of a great circle and the equator to the lower vertex is how many degrees of longitude?
  88. #1929 The longitude of the upper vertex of a great circle track is 169°E. What is the longitude of the lower vertex?
  89. #1930 From LAT 07°12'N, LONG 80°00'W, to LAT 47°12'S, LONG 169°18'E, the initial great circle course angle is 137.25°. How would you name this course?
  90. #1931 The initial great circle course angle between LAT 23°00'S, LONG 42°00'W and LAT 34°00'S, LONG 18°00'E is 063.8°. What is the true course?
  91. #1932 For navigational purposes, each great circle on the Earth has a length of __________.
  92. #1933 The cold ocean current which meets the warm Gulf Stream between latitudes 40° and 43°N to form the "cold wall" is called the __________.
  93. #1934 The speed of an ocean current is dependent on __________.
  94. #1935 You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect...
  95. #1936 How long would a steady wind need to blow in order to create a wind driven current?
  96. #1937 The current that, in many respects, is similar to the Gulf Stream is the __________.
  97. #1938 You are on a voyage from New Orleans to Boston and navigating off the Florida coast. You will get the greatest benefit from the Gulf Stream if you nav...
  98. #1939 Ocean currents are well defined and __________.
  99. #1940 The two most effective generating forces of surface ocean currents are __________.
  100. #1941 The approximate mean position of the axis of the Gulf Stream east of Palm Beach, FL, is __________.

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.