单项选择题

In a storm，the windward lines of a ship’s mooring system provide（）.

A.a positive righting moment
B.an increase in KM
C.a negative restoring force
D.a positive restoring force

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单项选择题
In a river subject to tidal currents，the best time to dock a ship without the assistance of tugs is（）.

A.at high water
B.when there is a following current
C.at slack water
D.at flood
单项选择题
If your vessel is dragging her anchor in a strong wind，you should（）.

A.shorten the scope of anchor cable
B.increase the scope of anchor cable
C.put over the sea anchor
D.put over a stern anchor
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