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单选题
Compass error is equal to the().
A
deviation minus variation
B
variation plus compass course
C
combined variation and deviation
D
difference between true and magnetic heading
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单选题A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment? ()A
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单选题The error in a magnetic compass caused by the vessel’s magnetism is called().A
variationB
deviationC
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单选题The compass error of a magnetic compass that has no deviation is().A
zeroB
equal to variationC
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constant at any geographical location
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单选题When adjusting a magnetic compass for error,a deviation table should be made().A
before correcting for any deviationB
after correcting for variationC
after adjusting the fore-and-aft and athwartships permanent magnetsD
before the quadrantal correctors are placed on the compass
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