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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 1,201–1,300 of 2,639 · page 13 of 27

  1. #1287 In the Northern Hemisphere, what do winds veering sharply to the west or northwest with increasing speed indicate?
  2. #1288 Cumulonimbus clouds are most likely to accompany a(n) __________.
  3. #1289 When a cold air mass and a warm air mass meet, and there is no horizontal motion of either air mass, it is called a(n) __________.
  4. #1290 When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.
  5. #1291 How does visibility change after the passage of a cold front?
  6. #1292 When a warm air mass overtakes and replaces a cold air mass, the contact surface is called a(n) __________.
  7. #1293 What is true about a front?
  8. #1294 Which of the following is a boundary between two air masses?
  9. #1295 When a warm air mass overtakes a cold air mass, the contact surface is called a __________.
  10. #1296 As it approaches, a typical warm front will bring __________.
  11. #1297 Squall lines with an almost unbroken line of threatening dark clouds and sharp changes in wind direction, generally precede a(n) __________.
  12. #1298 A cloud sequence of cirrus, cirrostratus, and altostratus clouds followed by rain usually signifies the approach of a(n) __________.
  13. #1299 Which is a characteristic of the weather preceding an approaching warm front?
  14. #1300 As a warm front approaches how does barometric pressure change?
  15. #1301 The first indications a mariner will have of the approach of a warm front will be __________.
  16. #1302 What is typical of warm front weather conditions?
  17. #1303 The FIRST indications a mariner will have of the approach of a warm front will be __________.
  18. #1304 Steady precipitation is typical of __________.
  19. #1305 Despite weather predictions for continued good weather, a prudent mariner should be alert for all of the following, EXCEPT a sudden __________.
  20. #1306 A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is...
  21. #1307 A light, feathery deposit of ice caused by the sublimation of water vapor directly into the crystalline form, on objects whose temperatures are below...
  22. #1308 Which type of precipitation is a product of the violent convection found in thunderstorms?
  23. #1309 Which condition(s) is(are) necessary for the formation of dew?
  24. #1310 A slow rise in the barometric pressure forecasts __________.
  25. #1311 Atmospheric pressure at sea level is equal to __________.
  26. #1312 Anticyclones are usually characterized by __________.
  27. #1313 The standard atmospheric pressure in millibars is __________.
  28. #1314 If you observe a rapid fall of barometric pressure you should __________.
  29. #1315 As a high pressure system approaches, the barometer reading __________.
  30. #1316 The standard atmospheric pressure measured in inches of mercury is __________.
  31. #1317 A generally circular low pressure area is called a(n) __________.
  32. #1318 When observing a rapid rise in barometric pressure, you may expect __________.
  33. #1319 What is a common unit of measure for atmospheric pressure?
  34. #1320 In the Northern Hemisphere, when the center of a high pressure system is due east of your position, you can expect winds from the __________.
  35. #1321 The wind direction around a low pressure area in the Northern Hemisphere is __________.
  36. #1322 A millibar is a unit of __________.
  37. #1323 In the Northern Hemisphere, an area of counterclockwise wind circulation surrounded by higher pressure is a __________.
  38. #1324 The pressure gradient between the horse latitudes and doldrums runs __________.
  39. #1325 A barometer showing falling pressure indicates the approach of a __________.
  40. #1326 Stormy weather is usually associated with regions of __________.
  41. #1327 Pressure gradient is a measure of __________.
  42. #1328 The diurnal pressure variation is most noticeable in the __________.
  43. #1329 Little or no change in the barometric reading over a twelve hour period indicates __________.
  44. #1330 The daily recurring pattern of pressure changes most noticeable in low latitudes is the __________.
  45. #1331 In low latitudes the range of the diurnal variation of pressure is up to __________.
  46. #1332 In low latitudes, the high(s) of the diurnal variation of pressure occur(s) at __________.
  47. #1333 In low latitudes, the low(s) of the diurnal variation of pressure occur(s) at __________.
  48. #1334 The diurnal variation of pressure is most noticeable __________.
  49. #1335 The diurnal variation of pressure is not visible in the middle latitudes in winter because __________.
  50. #1336 Generally speaking, in the Northern Hemisphere, when winds are blowing from between SE and SW the barometric reading __________.
  51. #1337 A slow, gradual fall of the barometer indicates approaching __________.
  52. #1338 When your barometer reading changes from 30.25 to 30.05 in a 12-hour period it indicates __________.
  53. #1339 A rapid rise or fall of the barometer indicates __________.
  54. #1340 Two well-developed high pressure areas may be separated by a __________.
  55. #1341 Generally speaking, you should expect to find low atmospheric pressure prevailing in the earth's __________.
  56. #1342 Which general weather conditions should you expect to find in a low pressure system?
  57. #1343 Two well-developed low pressure areas may be separated by a __________.
  58. #1344 A cyclone in its final stage of development is called a(n) __________.
  59. #1345 The wind circulation around a high pressure center in the Northern Hemisphere is __________.
  60. #1346 Good weather is usually associated with a region of __________.
  61. #1347 Most high pressure areas in the United States are accompanied by __________.
  62. #1348 A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.
  63. #1349 In the Southern Hemisphere the wind circulation in a high pressure system rotates __________.
  64. #1350 Compared to a low pressure system, generally the air in a high is __________.
  65. #1351 Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
  66. #1352 You are located within a stationary high pressure area. Your aneroid barometer is falling very slowly. This indicates a(n) __________.
  67. #1353 The dry-bulb temperature is 78°F and the wet-bulb temperature is 62°F. What is the relative humidity?
  68. #1354 The dry-bulb temperature is 78°F (26°C) and the wet-bulb temperature is 68°F (20°C). What is the relative humidity?
  69. #1355 Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at __________.
  70. #1356 The dew point is reached when the __________.
  71. #1357 The expression "the air is saturated" means __________.
  72. #1358 The temperature at which the air is saturated with water vapor and below which condensation of water vapor will occur is referred to as the __________...
  73. #1359 The dew point temperature is __________.
  74. #1360 As the temperature for a given mass of air increases, the __________.
  75. #1361 As the temperature of an air mass decreases, the __________.
  76. #1362 Relative humidity is defined as __________.
  77. #1363 On the Mississippi and Ohio Rivers, there is a special type of fog known as steam fog. It is caused by __________.
  78. #1364 Steam fog is most likely to occur on the Mississippi and Ohio Rivers in __________.
  79. #1365 While upbound through Memphis, the weather report on the TV news indicates that a cold front will cross western Kentucky and Tennessee the next mornin...
  80. #1366 While passing through Memphis, the weather report on the TV news indicates that a cold front is crossing western Kentucky and Tennessee. Tomorrow's we...
  81. #1367 While upbound through Memphis, the weather report on TV news indicates that a warm front is stationary over the Kentucky - Missouri - Tennessee areas....
  82. #1368 Under ideal viewing conditions, the dimmest star that can be seen with the unaided eye is of what magnitude?
  83. #1369 Discounting slip, if your vessel is turning RPM for 10 knots and making good a speed of 10 knots, the current could be __________.
  84. #1370 What is the definition of height of tide?
  85. #1371 You are running parallel to the coast and estimate that the current is against you. In plotting a running fix using bearings from the same object on t...
  86. #1372 Some locations maintain a zone time of -13. What are the Greenwich time and date if the zone time and date are 0152, 10 January?
  87. #1373 The set of the equatorial countercurrent is generally to the __________.
  88. #1375 A vessel's position should be plotted using bearings of __________.
  89. #1377 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...
  90. #1378 What is the equivalent of 4°36' in time units?
  91. #1379 What is the equivalent of 2° 35' in time units?
  92. #1380 The time meridian used when computing the height of tide or the velocity of the current for Pensacola Bay, FL, is __________.
  93. #1381 A current perpendicular to a vessel's track has the greatest effect on the vessel's course made good __________.
  94. #1382 The lunar or tidal day is __________.
  95. #1384 In the horizon system of coordinates what is equivalent to the equator on the Earth?
  96. #1385 Your vessel has changed course and is heading 285°T, you are on the charted range and it appears as in illustration D048NG below. After several minute... illustration
  97. #1386 After an item of required safety equipment on a towing vessel fails, the owner or Master must consider all of these factors before continuing the voya...
  98. #1387 Which statement is TRUE concerning the current of the Gulf Stream?
  99. #1388 The reference point for determination of GMT is the passage of the mean sun over what line?
  100. #1391 An important lunar cycle affecting the tidal cycle is called the nodal period. How long is this cycle?

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.