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1. The Earth's irregular heating is caused by __________.

 
 
 
 

2. The ecliptic is __________.

 
 
 
 

3. The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the __________.

 
 
 
 

4. 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 will the apparent Sun cross the meridian?

 
 
 
 

5. The equation of time measures the __________.

 
 
 
 

6. The equator is __________.

 
 
 
 

7. The error in a sextant altitude caused by refraction is greatest when the celestial body is __________.

 
 
 
 

8. The expression "first magnitude" is usually used to refer only to bodies of magnitude __________.

 
 
 
 

9. The expression "the air is saturated" means __________.

 
 
 
 

10. The eye of a hurricane is surrounded by dense black cumulonimbus clouds which are called the __________.

 
 
 
 

11. The first cloud formations you can use to indicate the bearing of the center of a hurricane or tropical storm are __________.

 
 
 
 

12. The first indications a mariner will have of the approach of a warm front will be __________.

 
 
 
 

13. The FIRST indications a mariner will have of the approach of a warm front will be __________.

 
 
 
 

14. The first point of Aries is the point where the Sun is at __________.

 
 
 
 

15. The First Point of Aries is the position of the Sun on the celestial sphere on or about __________.

 
 
 
 

16. The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval?

 
 
 
 

17. The Flinders bar on a magnetic compass compensates for the __________.

 
 
 
 

18. The flow of air around an anticyclone in the Southern Hemisphere is __________.

 
 
 
 

19. The fog most commonly encountered at sea is called __________.

 
 
 
 

20. The fog produced by warm moist air passing over a cold surface is called __________.

 
 
 
 

21. The following boats are approaching a lock. Which has priority for locking?

 
 
 
 

22. The following types of vessels are awaiting lockage on the upper Mississippi. Which type of vessel is normally passed through the lock first?

 
 
 
 

23. The force resulting from the earth's rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called __________.

 
 
 
 

24. The form of cloud often known as "mackerel sky" which is generally associated with fair weather is __________.

 
 
 
 

25. The four standard light colors used for lighted aids to navigation are red, green, white, and __________.

 
 
 
 

26. The GHA of a star __________.

 
 
 
 

27. The GHA of the first point of Aries is 315° and the GHA of a planet is 150°. What is the right ascension of the planet?

 
 
 
 

28. The GP of a body for a high altitude sight is determined from the declination and the __________.

 
 
 
 

29. The GP of a body for a high altitude sight is determined from the Greenwich hour angle and the __________.

 
 
 
 

30. The great circle of the celestial sphere that passes through the zenith, nadir, and the eastern point of the horizon is the __________.

 
 
 
 

31. The great circle on the celestial sphere that passes through the zenith and the north and south poles is the __________.

 
 
 
 

32. The greater the pressure difference between a high and a low pressure center, the __________.

 
 
 
 

33. The greatest directive force is exerted on the magnetic compass when the __________.

 
 
 
 

34. The gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction is called __________.

 
 
 
 

35. The heading of a vessel is indicated by what part of the compass?

 
 
 
 

36. The height of a light is measured from which reference plane?

 
 
 
 

37. The height of a wave is the vertical distance __________.

 
 
 
 

38. The height of tide is the __________.

 
 
 
 

39. The highest frequency of tropical cyclones in the North Atlantic Ocean occurs during __________.

 
 
 
 

40. The highest level of commercial navigational accuracy is provided by__________.

 
 
 
 

41. The horizon glass of a sextant is __________.

 
 
 
 

42. The horizontal angle between the magnetic meridian and the north- south line of the magnetic compass is __________.

 
 
 
 

43. The horse latitudes are characterized by __________.

 
 
 
 

44. The Humboldt Current flows in which direction?

 
 
 
 

45. The hurricane season in the North Atlantic Ocean reaches its peak during the month of __________.

 
 
 
 

46. The IALA Buoyage Systems do NOT apply to __________.

 
 
 
 

47. The left half of the storm is called the navigable semicircle because __________.

 
 
 
 

48. The compass rose on a nautical chart indicates both variation and __________.

 
 
 
 

49. The consistent winds blowing from the horse latitudes to the doldrums are called the __________.

 
 
 
 

50. The constellation that contains Polaris is __________.

 
 
 
 

51. The constellation that contains the pointer stars is __________.

 
 
 
 

52. The controlling depth of the river is __________.

 
 
 
 

53. The correction tables in the front of the Nautical Almanac for use with sun sights do NOT include the effects of __________.

 
 
 
 

54. The correction tables in the Nautical Almanac for use with Moon sights do NOT include the effects of __________.

 
 
 
 

55. The correction(s) which must be applied to an aneroid barometer reading include(s) __________.

 
 
 
 

56. The current that, in many respects, is similar to the Gulf Stream is the __________.

 
 
 
 

57. The Daily Memorandum contains information on __________.

 
 
 
 

58. The daily path of a celestial body that is parallel to the celestial equator is the __________.

 
 
 
 

59. The daily recurring pattern of pressure changes most noticeable in low latitudes is the __________.

 
 
 
 

60. The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm __________.

 
 
 
 

61. The dangerous semicircle of a typhoon in the Southern Hemisphere is that area __________.

 
 
 
 

62. The database information that should be shown when a chart is first displayed on ECDIS is the __________.

 
 
 
 

63. The database resulting from (1) the transformation of the electronic navigational chart (ENC) by ECDIS for appropriate use, (2) the updates to the ENC by appropriate means, and (3) the additional data added by the mariner, is called the __________.

 
 
 
 

64. The date is the same all over the world at __________.

 
 
 
 

65. The datum from which the predicted heights of tides are reckoned in the tide tables is __________.

 
 
 
 

66. The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the charts of the locality. The depression of the datum below mean sea level for Hampton Roads, Virginia is __________.

 
 
 
 

67. The datum used for soundings on charts of the East Coast of the United States is __________.

 
 
 
 

68. The dense black cumulonimbus clouds surrounding the eye of a hurricane are called __________.

 
 
 
 

69. The description "Racon" beside an illustration on a chart would mean a __________.

 
 
 
 

70. The dew point is reached when the __________.

 
 
 
 

71. The dew point temperature is __________.

 
 
 
 

72. The diameter of the Sun and Moon as seen from the Earth varies slightly but averages about __________.

 
 
 
 

73. The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the __________.

 
 
 
 

74. The difference between local apparent time (LAT) and local mean time (LMT) is indicated by the __________.

 
 
 
 

75. The difference between magnetic heading and compass heading is called __________.

 
 
 
 

76. The difference between the DR position and a fix, both of which have the same time, is caused by __________.

 
 
 
 

77. The difference between the heights of low and high tide is the __________.

 
 
 
 

78. The difference in degrees between true north and magnetic north is called __________.

 
 
 
 

79. The difference in local time between an observer on 114°W and one on 119°W is __________.

 
 
 
 

80. The difference of latitude (l) between the geographic position (GP) of a celestial body and your position, at the time of upper transit, is represented by __________.

 
 
 
 

81. The direction a vessel is pointed at any given time is the __________.

 
 
 
 

82. The direction in which a vessel is steered is the course. The path actually followed is the __________.

 
 
 
 

83. The direction in which a vessel should be steered between two points is the __________.

 
 
 
 

84. The direction of prevailing winds in the Northern hemisphere is caused by the __________.

 
 
 
 

85. The direction of the southeast trade winds is a result of the __________.

 
 
 
 

86. The direction of the surface wind is __________.

 
 
 
 

87. The directive force of a gyrocompass __________.

 
 
 
 

88. The distance between any two meridians measured along a parallel of latitude __________.

 
 
 
 

89. The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.

 
 
 
 

90. The distance between the surface of the water and the tidal datum is the __________.

 
 
 
 

91. The distance in longitude from the intersection of a great circle and the equator to the lower vertex is how many degrees of longitude?

 
 
 
 

92. 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 (Hc) is the __________.

 
 
 
 

93. The distance to the nearest vertex from any point on a great circle track cannot exceed __________.

 
 
 
 

94. The diurnal inequality of the tides is caused by __________.

 
 
 
 

95. The diurnal pressure variation is most noticeable in the __________.

 
 
 
 

96. The diurnal variation of pressure is most noticeable __________.

 
 
 
 

97. The diurnal variation of pressure is not visible in the middle latitudes in winter because __________.

 
 
 
 

98. The drift and set of tidal, river, and ocean currents refer to the __________.

 
 
 
 

99. The dumping of refuse in a lock is permitted __________.

 
 
 
 

100. The Earth has the shape of a(n) __________.

 
 
 
 

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