单项选择题

The error in a magnetic compass caused by the vessel’s magnetism is called（）.

A.variation
B.deviation
C.compass error
D.bearing error

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单项选择题

A.increases with latitude，being maximum at the geographic poles
B.decreases with latitude，being maximum at the geographic equator
C.is greatest when a vessel is near the Earth's magnetic equator
D.remains the same at all latitudes

单项选择题

The difference between magnetic heading and compass heading is called（）.

A.variation
B.deviation
C.compass error
D.drift

单项选择题

The compass heading of a vessel differs from the true heading by（）.

A.compass error
B.variation
C.magnetic dip
D.deviation