1 945 Ref: Definition, Earth, Latitude A The equator is __________. A. the primary great circle of the Earth perpendicular to the axis B. the line to which all celestial observations are reduced C. the line from which a celestial body's altitude is measured D. All of the above 2 1111 Ref: Definition, Earth, Latitude A The parallel of latitude at 23°27'N is the __________. A. Tropic of Cancer C. Arctic Circle B. Tropic of Capricorn D. ecliptic 3 1112 Ref: Definition, Earth, Latitude B The parallel of latitude at 23°27'S is the __________. A. Tropic of Cancer C. Arctic Circle B. Tropic of Capricorn D. ecliptic 4 1113 Ref: Definition, Earth, Latitude C The parallel of latitude at 66°33'N is the __________. A. Tropic of Cancer C. Arctic Circle B. Tropic of Capricorn D. ecliptic 5 132 Ref: Definition, Earth, Longitude D A plane perpendicular to the polar axis will never form what line on the Earth's surface? A. Great circle C. Small circle B. Equator D. Meridian 6 133 Ref: Definition, Earth, Longitude D A plane that cuts the Earth's surface and passes through the poles will always form __________. A. the equator C. a small circle B. a loxodromic curve D. a meridian 7 814 Ref: Definition, Earth, Longitude C The angle at the pole measured through 180°, from the prime meridian to the meridian of a point is known as __________. A. the departure C. longitude B. the polar arc D. Greenwich hour angle 8 8 Ref: Definition, Earth, N M B 15° of latitude is equal to __________. A. 600 miles C. 1200 miles B. 900 miles D. 1500 miles 9 9 Ref: Definition, Earth, N M C 17 degrees of latitude is equal to __________. A. 68 miles C. 1020 miles B. 510 miles D. 4080 miles 10 121 Ref: Definition, Earth, N M D A nautical mile is a distance of approximately how much greater than or less than a statute mile? A. 1/4 less C. 1/4 greater B. 1/7 less D. 1/7 greater 11 711 Ref: Definition, Earth, N M C On a Mercator chart, 1 nautical mile is equal to __________. A. 1 minute of longitude C. 1 minute of latitude B. 1 degree of longitude D. 1 degree of latitude

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12 1250 Ref: Definition, Earth, N M B The value of sixty nautical miles per degree of geodetic latitude is most correct at __________. A. the equator C. the poles B. latitude 45° D. all latitudes 13 1460 Ref: Definition, Earth, N M C What is the length of a nautical mile? A. 1,800 meters C. 6,076 feet B. 2,000 yards D. 5,280 feet 14 937 Ref: Definition, Earth, Oblate B The Earth has the shape of a(n) __________. A. sphere C. spheroid of revolution B. oblate spheroid D. oblate eggoid 15 104 Ref: Definition, Earth, Small Circle B A line on the Earth parallel to the equator is a __________. A. gnomonic curve C. meridian B. small circle D. great circle 16 126 Ref: Definition, Earth, Small Circle C A parallel of latitude other than the equator is a __________. A. great circle C. small circle B. loxodromic curve D. gnomonic curve 17 73 Ref: Definition, Earth, Great Circle A A great circle track provides the maximum saving in distance on __________. A. easterly courses in high latitudes B. southerly courses in high latitudes C. westerly courses in low latitudes D. easterly courses in low latitudes that cross the equator 18 134 Ref: Definition, Earth, Great Circle B A plane that cuts the Earth's surface at any angle and passes through the center will always form ______. A. the equator C. a small circle B. a great circle D. a meridian 19 437 Ref: Definition, Earth, Great Circle B Except for N-S courses, and E-W courses on the equator, a great circle track between two points, when compared to a rhumb line track between the same two points, will __________. A. always be nearer to the equator B. always be nearer to the elevated pole C. be nearer to the pole in the Northern Hemisphere and nearer to the equator in the Southern

Hemisphere D. be nearer to the pole or the equator depending on the latitudes of the arrival and departure positions 20 1196 Ref: Definition, Earth, Great Circle B The shortest distance between any two points on earth defines a __________. A. small circle C. rhumb line B. great circle D. hyperbola 21 1375 Ref: Definition, Earth, Great Circle C What defines a great circle? A. A curved line drawn on a Mercator Chart B. A course line that inscribes a loxodromic curve C. The shortest distance between any two points on the earth D. The smallest circle that can be drawn on the face of a sphere

Navigation General General Definition Questions

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22 1397 Ref: Definition, Earth, Rhumb Line C What is a characteristic of a rhumb line? A. It is the shortest distance between two points on the Earth. B. It plots as a straight line on a Lambert conformal chart. C. It cuts each meridian at the same angle. D. The course angle constantly changes to form the loxodromic curve. 23 1411 Ref: Definition, Earth, Rhumb Line D What is NOT an advantage of the rhumb line track over a great circle track? A. Easily plotted on a Mercator chart B. Negligible increase in distance on east-west courses near the equator C. Does not require constant course changes D. Plots as a straight line on Lambert conformal charts 24 1464 Ref: Definition, Earth, Rhumb Line A What is the major advantage of a rhumb line track? A. The vessel can steam on a constant heading (disregarding wind, current, etc.). B. The rhumb line is the shortest distance between the arrival and departure points. C. It is easily plotted on a gnomonic chart for comparison with a great circle course. D. It approximates a great circle on east-west courses in high latitudes. 25 1585 Ref: Definition, Earth, Rhumb Line B When is the rhumb line distance the same as the great circle distance? A. Course 090°T in high latitudes B. Course 180°T when you cross the equator C. Course 045°T in low latitudes D. The rhumb line distance is always longer than the great circle distance. 26 431 Ref: Definition, Compass, Point B Eight points of a compass are equal to how many degrees? A. 45 B. 90 C. 180 D. 360 27 479 Ref: Definition, Compass, Point D How many points are there in a compass card? A. 4 B. 8 C. 24 D. 32 28 739 Ref: Definition, Compass, Point B One point of a compass is equal to how many degrees? A. 7.5 B. 11.25 C. 17.5 D. 22.5 29 912 Ref: Definition, Departure D The distance between any two meridians measured along a parallel of latitude __________. A. increases in north latitude and decreases in south latitude B. decreases as DLO increases C. increases with increased latitude D. decreases with increased latitude 30 913 Ref: Definition, Departure C The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________. A. difference in longitude C. departure B. mid-longitude D. meridian angle 31 887 Ref: Definition, Depth, Conversion C The depth of the water is indicated on a chart as 32 meters. This is equal to __________. A. 11.50 fathoms C. 17.50 fathoms B. 12.62 fathoms D. 104.99 fathoms

Navigation General General Definition Questions

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32 888 Ref: Definition, Depth, Conversion B The depth of water on a chart is indicated as 23 meters. This is equal to __________. A. 11.5 fathoms C. 69.0 feet B. 12.6 fathoms D. 78.6 feet 33 78 Ref: Definition, Instrument D A hand held instrument used to measure distances between objects and the ship is a __________. A. vernier C. hygrometer B. psychrometer D. stadimeter 34 347 Ref: Definition, M Part B Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent? A. 35°52'45" C. 74°21'11" B. 51°39'00" D. 82°36'12" 35 17 Ref: Definition, Reef B A bold reef is a reef __________. A. with part of it extending above the water C. that drops off sharply B. that can be detected by water turbulence D. perpendicular to the current 36 1686 Ref: Definition, Set & Drift C Which error is NOT included in the term "current" when used in relation to a fix? A. Poor steering C. Known compass error B. Leeway D. Ocean currents 37 1206 Ref: Definition, Sound D The speed of sound in water is approximately __________. A. 1.5 times its speed in air C. 3.5 times its speed in air B. 2.5 times its speed in air D. 4.5 times its speed in air 38 906 Ref: Definition, Track, COG D The direction in which a vessel is steered is the course. The path actually followed is the __________. A. route C. heading B. track D. course over the ground 39 907 Ref: Definition, Track, Course A The direction in which a vessel should be steered between two points is the __________. A. course C. bearing B. heading D. course over the ground 40 905 Ref: Definition, Track, Heading C The direction a vessel is pointed at any given time is the __________. A. course C. heading B. track D. course over the ground 41 1117 Ref: Definition, Track B The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the point of arrival, is the __________. A. DR plot C. heading B. track line D. estimated course 42 1119 Ref: Definition, Track B The paths of intended travel between three or more points is the __________. A. course C. bearing B. track D. course over the ground

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