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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 1,801–1,900 of 2,639 · page 19 of 27

  1. #1942 Generally speaking, a ship steaming across the North Pacific from Japan to Seattle is likely to experience __________.
  2. #1943 In the Northern Hemisphere the major ocean currents tend to flow __________.
  3. #1944 Which statement(s) concerning the effect of Coriolis force on ocean currents is(are) correct?
  4. #1945 You are on a voyage from New Orleans to Boston. When navigating off the Florida coast, you will get the greatest benefit from the Gulf Stream if you n...
  5. #1946 When a current flows in the opposite direction to the waves, the wave __________.
  6. #1947 A coastal current __________.
  7. #1948 Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes?
  8. #1949 On an Atlantic Ocean voyage from New York to Durban, South Africa, you should expect the Agulhas Current to present a strong __________.
  9. #1950 The Humboldt Current flows in which direction?
  10. #1951 As the South Equatorial Current approaches the east coast of Africa, it divides with the main part flowing south to form the warm __________.
  11. #1952 In which month will the equatorial counter current be strongest?
  12. #1955 Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise...
  13. #1957 On a voyage from Halifax, N.S., to Dakar, West Africa, the Canary Current will __________.
  14. #1958 The Brazil Current flows in which general direction?
  15. #1959 On a voyage from Cape Town to London, the favorable ocean current off the coast of Africa is the __________.
  16. #1960 The Benguela Current flows in a __________.
  17. #1962 The steady current circling the globe at about 60°S is the __________.
  18. #1963 The West Wind Drift is located __________.
  19. #1964 You are bound for Baltimore via Cape Henry on a 15 knot ship. If the flood at Chesapeake Bay entrance begins at 1800 EST (ZD +5), at what time would y...
  20. #1966 Information about the direction and velocity of rotary tidal currents is found in the __________.
  21. #1967 Information about the direction and velocity of rotary tidal currents is found in the __________.
  22. #1968 Where will you find information about the duration of slack water?
  23. #1969 You will find information about the duration of slack water in the __________.
  24. #1970 Information about direction and velocity of rotary tidal currents is found in the __________.
  25. #1971 Data relating to the direction and velocity of rotary tidal currents can be found in the __________.
  26. #1972 Information about currents around Pacific Coast ports of the U.S. is found in the __________.
  27. #1973 Information about currents on the Pacific Coast of the U. S. are found in the __________.
  28. #1974 Information about currents on the Pacific Coast of the U. S. is found in the __________.
  29. #1975 Where would you find information concerning the duration of slack water?
  30. #1976 The velocity of the current in large coastal harbors is __________.
  31. #1977 How many slack tidal currents usually occur each day on the east coast of the United States?
  32. #1978 To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at which time in relation to the predicted t...
  33. #1979 When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.
  34. #1980 In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.
  35. #1981 A rotary current sets through all directions of the compass. The time it takes to complete one of these cycles, in a locale off the East coast of the...
  36. #1982 The velocity of a rotary tidal current will be decreased when the Moon is __________.
  37. #1983 The velocity of a rotary tidal current will increase when the Moon is __________.
  38. #1984 Where would you find information about the time of high tide at a specific location on a particular day of the year?
  39. #1985 To predict the actual depth of water using the Tide Tables, the number obtained from the Tide Tables is __________.
  40. #1986 When daylight savings time is kept, the times of tide and current calculations must be adjusted. One way of doing this is to __________.
  41. #1987 When daylight savings time is kept the times of tide and current calculations must be adjusted. One way of doing this is to __________.
  42. #1988 The time meridian used for tide computations in New York Harbor is __________.
  43. #1989 The time meridian that is used when computing the currents for Pensacola Bay, Florida, is __________.
  44. #1990 The tides in Boston Harbor generally __________.
  45. #1991 How many high waters usually occur each day on the East Coast of the United States?
  46. #1992 With respect to a reversing current, slack water occurs when there is __________.
  47. #1993 Spring tides occur __________.
  48. #1994 What describes a flood current?
  49. #1995 When the moon is new or full, which type of tides occur?
  50. #1996 The term "flood current" refers to that time when the water __________.
  51. #1997 The movement of water away from the shore or downstream is called a(n) __________.
  52. #1998 Spring tides occur when the __________.
  53. #1999 What describes an ebb current?
  54. #2000 What is an ebb current?
  55. #2001 Which term refers to the direction a current is flowing?
  56. #2002 Spring tides occur __________.
  57. #2003 The set of the current is the __________.
  58. #2004 The drift and set of tidal, river, and ocean currents refer to the __________.
  59. #2005 A swift current occurring in a narrow passage connecting two large bodies of water, which is produced by the continuously changing difference in heigh...
  60. #2006 Current refers to the __________.
  61. #2007 In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceedi...
  62. #2008 Your vessel goes aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at __________.
  63. #2009 When the moon is at first quarter or third quarter phase, what type of tides will occur?
  64. #2010 Neap tides occur only __________.
  65. #2011 Neap tides occur when the __________.
  66. #2012 The class of tide that prevails in the greatest number of important harbors on the Atlantic Coast is __________.
  67. #2013 In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of...
  68. #2014 Which statement is TRUE concerning apogean tides?
  69. #2015 Neap tides occur __________.
  70. #2016 When the Moon's declination is maximum north, which of the following will occur?
  71. #2017 Tropic tides are caused by the __________.
  72. #2018 Which statement is TRUE concerning equatorial tides?
  73. #2019 Priming of the tides occurs __________.
  74. #2020 What does the term "tide" refer to?
  75. #2021 Mean low water is the average height of __________.
  76. #2022 Mean high water is the average height of __________.
  77. #2023 The average height of the surface of the sea for all stages of the tide over a 19 year period is called __________.
  78. #2024 The diurnal inequality of the tides is caused by __________.
  79. #2025 A tide is called diurnal when __________.
  80. #2026 The height of tide is the __________.
  81. #2027 The vertical distance from the tidal datum to the level of the water is the __________.
  82. #2028 The distance between the surface of the water and the tidal datum is the __________.
  83. #2029 The vertical distance from the tidal datum to the level of the water is the __________.
  84. #2030 The distance between the surface of the water and the tidal datum is the __________.
  85. #2031 What is the definition of height of tide?
  86. #2032 The height of tide is the __________.
  87. #2033 The range of tide is the __________.
  88. #2034 The range of tide is the __________.
  89. #2035 The range of tide is the __________.
  90. #2036 The difference between the heights of low and high tide is the __________.
  91. #2037 Magnetic variation changes with a change in __________.
  92. #2038 The difference between the heights of low and high tide is the __________.
  93. #2039 The difference between the heights of low and high tide is the __________.
  94. #2040 The difference between the heights of low and high tide is the __________.
  95. #2041 The following boats are approaching a lock. Which has priority for locking?
  96. #2042 The range of tide is the __________.
  97. #2043 When there are small differences between the heights of two successive high tides or two low tides, in a tidal day, the tides are called __________.
  98. #2044 Spring tides are tides that __________.
  99. #2045 The point where the vertical rise or fall of tide has stopped is referred to as __________.
  100. #2046 "Stand" of the tide is that time when __________.

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.