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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 1,101–1,200 of 2,639 · page 12 of 27

  1. #1186 Where are the prevailing westerlies of the Southern Hemisphere located?
  2. #1187 The prevailing westerlies of the Southern Hemisphere blow 18 - 30 knots __________.
  3. #1188 The winds of the "roaring forties" are strongest near __________.
  4. #1190 The wind flow from the horse latitudes to the doldrums is deflected due to __________.
  5. #1191 On the pole side of the trade wind belt, there is an area of high pressure with weak pressure gradients and light, variable winds. This area is called...
  6. #1192 The region of high pressure extending around the Earth at about 35°N latitude is called the __________.
  7. #1193 The greater the pressure difference between a high and a low pressure center, the __________.
  8. #1194 Wind velocity varies __________.
  9. #1195 Which wind pattern has the most influence over the movement of frontal weather systems over the North American continent?
  10. #1196 In the doldrums you will NOT have __________.
  11. #1197 The doldrums are characterized by __________.
  12. #1198 In the doldrums you can expect __________.
  13. #1199 The prevailing winds in the band of latitude from approximately 5°N to 30°N are the __________.
  14. #1200 The consistent winds blowing from the horse latitudes to the doldrums are called the __________.
  15. #1201 During the winter months, the southeast trade winds are __________.
  16. #1202 The southeast trade winds actually blow toward the __________.
  17. #1203 The belt of light and variable winds between the westerly wind belt and the northeast trade winds is called the __________.
  18. #1204 The horse latitudes are characterized by __________.
  19. #1205 The "horse latitudes" are regions of __________.
  20. #1206 While taking weather observations, you determine that the wind is blowing from the northeast. You would record the wind direction in the weather log a...
  21. #1207 When recording the wind direction in the weather log, you would report the __________.
  22. #1208 Your ship is proceeding on course 320°T at a speed of 25 knots. The apparent wind is from 30° off the starboard bow, speed 32 knots. What is the relat...
  23. #1209 Your vessel is on course 270°T, speed 10 knots. The apparent wind is from 10° off the port bow, speed 30 knots. From which direction is the true wind?
  24. #1210 Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. The true direction and speed of the win...
  25. #1211 The probability of a sudden wind may be foretold by __________.
  26. #1212 A cloud of marked vertical development (often anvil-shaped) would be classified as __________.
  27. #1213 On a clear, warm day, you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rain is falling from the dark low...
  28. #1214 Which type of cloud formation should be of immediate concern to small craft operators?
  29. #1215 All of the following are associated with cumulonimbus clouds EXCEPT __________.
  30. #1216 Cumulonimbus clouds are formed by __________.
  31. #1217 Which type of cloud is the classic "thunderhead"?
  32. #1218 A sign of thunderstorm development is a cumulus cloud __________.
  33. #1219 Small, visible mound-like protuberances on the bottom of cumulonimbus clouds, that are potential breeding grounds for waterspouts and tornadoes, are c...
  34. #1220 The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?
  35. #1221 The low, dark, sheet-like cloud which is associated with continuous precipitation for many hours is a __________.
  36. #1222 Clouds with the prefix "nimbo" in their name __________.
  37. #1223 Uniform, grayish-white cloud sheets that cover large portions of the sky, and are responsible for a large percentage of the precipitation in the tempe...
  38. #1224 Altocumulus clouds are defined as __________.
  39. #1225 If the sky was clear, with the exception of a few cumulus clouds, it would indicate __________.
  40. #1226 The form of cloud often known as "mackerel sky" which is generally associated with fair weather is __________.
  41. #1227 High clouds, composed of small white flakes or scaly globular masses, and often banded together to form a "mackerel sky", would be classified as _____...
  42. #1228 A thin, whitish, high cloud popularly known as "mares' tails" is __________.
  43. #1229 Cirrus clouds are composed primarily of __________.
  44. #1230 Which type of cloud is composed entirely of ice crystals and is found at very high altitudes?
  45. #1231 The bases of middle clouds are located at altitudes of between __________.
  46. #1232 Which list of clouds is in sequence, from highest to lowest in the sky?
  47. #1233 A low, uniform layer of cloud resembling fog, but not resting on the ground, is called __________.
  48. #1234 Cloud formations are minimal when the __________.
  49. #1235 Clouds form __________.
  50. #1236 Clouds are classified according to their __________.
  51. #1237 Which type of weather could you expect soon after seeing "hook" or "comma" shaped cirrus clouds?
  52. #1238 What occurs when rising air cools to the dew point?
  53. #1239 The presence of stratus clouds and a dying wind will usually result in __________.
  54. #1240 In illustration D039NG below, what type of cloud is indicated by the number five? illustration
  55. #1241 In illustration D039NG below, what type of cloud is indicated by the number four? illustration
  56. #1242 In illustration D039NG below, which number indicates cirrus clouds? illustration
  57. #1243 Fog forms when the air __________.
  58. #1244 What will act to dissipate fog?
  59. #1245 Fog is formed when __________.
  60. #1246 Radiation fog __________.
  61. #1247 Fog forms when the air temperature is at or below __________.
  62. #1248 While on watch, you notice that the air temperature is dropping and is approaching the dew point. Which type of weather should be forecasted?
  63. #1249 When compared to air temperature, which factor is most useful in predicting fog?
  64. #1250 As the temperature of the air reaches the dew point, __________.
  65. #1251 Fog is likely to occur when there is little difference between the dew point and the __________.
  66. #1252 Fog generally clears when the __________.
  67. #1253 Steam smoke will occur when __________.
  68. #1254 Which condition would most likely result in fog?
  69. #1255 When warm moist air blows over a colder surface and is cooled below its dew point, the result is __________.
  70. #1256 Fog is most commonly associated with a(n) __________.
  71. #1257 The fog most commonly encountered at sea is called __________.
  72. #1258 The fog produced by warm moist air passing over a cold surface is called __________.
  73. #1259 How is an occluded front represented on a weather map?
  74. #1260 Your vessel is enroute from Japan to Seattle and is located at position I on the weather map in illustration D013NG below. You should experience which... illustration
  75. #1261 If you count 20 seconds between seeing lightning and hearing the thunder, how far is the storm away from you?
  76. #1262 Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________.
  77. #1263 Which of the symbols shown in illustration D018NG below represents a warm front? illustration
  78. #1264 Which of the symbols shown in illustration D018NG below represents an occluded front? illustration
  79. #1265 On a working copy of a weather map, a cold front is represented by what color line?
  80. #1266 What type of clouds are associated with a cold front?
  81. #1267 On a working copy of a weather map what color is the line that represents a stationary front?
  82. #1268 What weather change accompanies the passage of a cold front in the Northern Hemisphere?
  83. #1269 A cold front moving in from the northwest can produce __________.
  84. #1270 On a working copy of a weather map what color is the line that represents a warm front?
  85. #1271 Which type of frontal passage is associated with a relatively narrow band of precipitation?
  86. #1272 Which weather change accompanies the passage of a cold front in the Northern Hemisphere?
  87. #1273 Which condition will occur after a cold front passes?
  88. #1274 Which of the following typically happens to the barometric pressure after a cold front passes?
  89. #1275 Which of the following statements concerning frontal movements is TRUE?
  90. #1276 Which statement is TRUE when comparing cold and warm fronts?
  91. #1277 Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours. You should __________.
  92. #1278 When crossing a front how do isobars tend to change?
  93. #1279 A series of brief showers accompanied by strong, shifting winds may occur along or some distance ahead of a(n) __________.
  94. #1280 What happens to the barometric pressure after a cold front passes?
  95. #1281 How does the temperature change with the passage of an occluded front?
  96. #1282 As a cold front passes how do the pressure and the winds change?
  97. #1283 Which of the following causes the development of an occluded front?
  98. #1284 Which type of front forms when a cold front overtakes and forces a warm front upwards?
  99. #1285 In the Northern Hemisphere, gusty winds shifting clockwise, a rapid drop in temperature, thunderstorms or rain squalls in summer (frequent rain/snow s...
  100. #1286 When does a weather front exist?

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.