Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG General Navigation (Set 21)

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Question 1 of 30

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Question 1 of 30

Compass deviation is caused by __________.

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30 MCQs

#1 Compass deviation is caused by __________. #2 Deviation in a compass is caused by the __________. #3 Variation is not constant; it is different with every change in __________. #4 If a magnetic compass is not affected by any magnetic field other than the Earth's, which statement is TRUE? #5 The compass error of a magnetic compass that has no deviation is __________. #6 The standard magnetic compass heading differs from the true heading by __________. #7 Compass error is equal to the __________. #8 When changing from a compass course to a true course you should apply __________. #9 The chart indicates the variation was 3°45'W in 1988, and the annual change is decreasing 6'. If you use the chart in 1991 how much variation should you apply? #10 The chart indicates the variation was 3°45'W in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply? #11 The chart indicates the variation was 3°45'E in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply? #12 Variation is a compass error that you __________. #13 Error may be introduced into a magnetic compass by __________. #14 The lubber's line on a magnetic compass indicates __________. #15 Which would influence a magnetic compass? #16 As a vessel changes course to starboard, the compass card in a magnetic compass __________. #17 The permanent magnetism of a vessel may change in strength due to __________. #18 Which would influence a magnetic compass? #19 The lubber's line on a magnetic compass indicates __________. #20 The permanent magnetism of a vessel may change in strength due to __________. #21 The permanent magnetism of a vessel may change in polarity due to __________. #22 Magnets are placed in horizontal trays in the compass binnacle to compensate for the __________. #23 Magnets in the binnacles of magnetic compasses are used to reduce the effect of __________. #24 Permanent magnetism is caused by __________. #25 At the magnetic equator there is no induced magnetism in the vertical soft iron because __________. #26 The magnetic compass magnets are acted on by the horizontal component of the Earth's total magnetic force. This magnetic force is GREATEST at the __________. #27 Magnetism which is present only when the material is under the influence of an external field is called __________. #28 Induced magnetism is found in __________. #29 The line which connects the points of zero magnetic dip is __________. #30 The line connecting the points of the earth's surface where there is no dip is the __________.

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