單項選擇題

Magnets are placed in horizontal trays in the compass binnacle to compensate for the（）.

A.induced magnetism in the vessel's horizontal soft iron
B.change in the magnetic field when the vessel inclines from vertical
C.permanent magnetism of the vessel
D.magnetic fields caused by electrical currents in the vicinity

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單項選擇題

Magnetic variation changes with a change in（）.

A.the vessel's heading
B.sea conditions
C.seasons
D.the vessel's position

單項選擇題

Magnetic heading differs from compass heading by（）.

A.compass error
B.true heading
C.variation
D.deviation

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Magnets are placed in horizontal trays in the compass binnacle to compensate for the（）.

你可能感興趣的試題

Magnetic variation changes with a change in（）.

Magnetic heading differs from compass heading by（）.