单项选择题
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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相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
The Flinders bar on a magnetic compass compensates for the（）.
A.induced magnetism in vertical soft iron
B.induced magnetism in horizontal soft iron
C.permanent magnetism in ship's steel
D.vessel's inclination from the vertical
