單項選擇題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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1.單項選擇題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

2.單項選擇題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

3.單項選擇題All of the following are engaged in fishing EXCEPT（）.

A.A vessel trawling
B.A vessel trolling
C.A vessel setting nets
D.A vessel tending lines

4.單項選擇題A vessel with a large GM will（）.

A.have more resistance to listing in case of damage
B.have less tendency to have synchronous rolling
C.be less likely to have cargo shift
D.ride more comfortably

5.單項選擇題A vessel will NOT show sidelights when（）.

A.underway but not making way
B.making way，not under command
C.not under command，not making way
D.trolling underway