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單項(xiàng)選擇題

By day，you sight a vessel displaying three shapes in a vertical line. The top and bottom shapes are balls，and the middle shape is a diamond. It could be a（）.

A.vessel trolling
B.mineclearing vessel
C.trawler
D.vessel engaged in replenishment at sea

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單項(xiàng)選擇題

As a rule，ships of most configurations，when drifting in calm water with neglible current，will lie（）.

A.bow to the wind
B.beam to the wind
C.stern to the wind
D.with the wind on the quarter

單項(xiàng)選擇題

An inclined semisubmersible with a very short rolling period about a constant angle of list is likely to have（）.

A.an off-center TCG
B.an LCG greater than level vessel LCB
C.a negative GM
D.excessive free surfaces

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