A.variationB.deviationC.compass errorD.bearing errorThe……

单项选择题The directive force of a gyrocompass（）.

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

单项选择题The compass error of a magnetic compass that has no deviation is（）.

A.zero
B.equal to variation
C.eliminated by adjusting the compass
D.constant at any geographical location

单项选择题The compass deviation changes as the vessel changes（）.

A.geographical position
B.speed
C.heading
D.longitude