Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG General Navigation (Set 51)
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Question 1 of 30
The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?
Browse Questions in Set 51
30 MCQs #1 The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration? #2 The period of revolution of the Moon is __________. #3 The period of rotation of the Moon on its axis is __________. #4 The Moon is nearest to the Earth at __________. #5 At upper transit, if the zenith distance is 34°, the geographical distance from the observer to a body's GP is __________. #6 The Moon is farthest from the Earth at __________. #7 The angle at the pole measured through 180°From the prime meridian to the meridian of a point is known as __________. #8 The equation of time is 8m 00s. The mean Sun is ahead of the apparent Sun. If you are 2°W of the central meridian of your time zone, when will the apparent Sun cross your meridian? #9 During daylight savings time the meridian used for determining the time is located farther __________. #10 In high latitudes, celestial observations can be made over a horizon covered with pack ice by bringing the sun tangent to the ice and __________. #11 What condition exists at apogee? #12 What condition exists at perigee? #13 The major problem with Moon sights is the __________. #14 Upper limb observations of the Moon are used more frequently than those of the Sun because of the location of the Moon in the sky and the __________. #15 What happens because of augmentation? #16 When taking stars, those bodies to the east and west will __________. #17 In low latitudes, a first quarter Moon will always rise at about __________. #18 A navigator fixing a vessel's position by radar __________. #19 In low latitudes, the new Moon will always rise at about __________. #20 In order for a star to be used for a sight at lower transit, the star must __________. #21 In the celestial equator system of coordinates what is NOT equivalent to the longitude of the Earth system of coordinates? #22 At about GMT 1436, on 3 December, the lower limb of the Moon is observed with a sextant having an index error of 2.5' on the arc. The height of eye is 32 feet. The sextant altitude (hs) is 3°38.8'. What is the observed altitude? #23 In low latitudes, a last quarter moon will always rise at about __________. #24 Some places maintain a zone time of -13. What are the time and date at Greenwich if the zone time and date are 2152, 10 January? #25 The new Moon cannot be seen because the Moon is __________. #26 The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________. #27 You should plot a dead reckoning position after every __________. #28 In which of the following does the arc of a great circle pass through a body and the celestial poles? #29 Concerning a celestial observation, the azimuth angle is measured from the principal vertical circle to the __________. #30 A vessel crossing a river on the Western Rivers has the right of way over __________.
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