A.north magnetic poleB.south magnetic poleC.magnetic pr……

单项选择题The lubber’s line on a magnetic compass indicates（）.

A.compass north
B.the direction of the vessel's head
C.magnetic north
D.a relative bearing taken with an azimuth circle

单项选择题The lubber’s line of a magnetic compass（）.

A.always shows true north direction
B.indicates the vessel's heading
C.is always parallel to the vessel's transom
D.is located on the compass card

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

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