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單項選擇題

The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is（）.

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

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單項選擇題

The gyrocompass error resulting from your vessel’s movement in OTHER than an east-west direction is called（）.

A.damping error
B.ballistic deflection
C.quadrantal error
D.speed error

單項選擇題

The greatest directive force is exerted on the magnetic compass when the（）.

A.needles are nearly in line with the meridian
B.vessel is near the magnetic poles
C.variation is near zero
D.vessel is near the magnetic equator