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單項選擇題

The vertical movement of a vessel in the water is called（）.

A.pitch
B.sway
C.heave
D.roll

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單項選擇題

The time required to incline from bow down to stern down and return to bow down again is called（）.

A.rolling period
B.amplitude moment
C.inclining moment
D.pitching period

單項選擇題

The principal action in changing from transit to survival draft in the event heavy weather threatens is（）.

A.ballasting
B.deballasting
C.disconnecting
D.hanging off