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單項(xiàng)選擇題

The principal purpose of adjustment of the magnetic compass is to eliminate（）as far as possible.

A.variation
B.compass error
C.deviation
D.earth's magnetic force

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單項(xiàng)選擇題

The routing system which aimed at reducing the risk of casualties is called as（）.

A.traffic separation schemes
B.recommended tracks
C.precautionary areas
D.inshore traffic zones

單項(xiàng)選擇題

The ship has a list of 5 degrees（）starboard.

A.on
B.to
C.for
D.of

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