单项选择题
A vessel showing a rigid replica of the International Code flag A is engaged in（）.
A.diving operations
B.dredging
C.fishing
D.mineclearance operations
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A.avoid collision
B.allow more time to assess the situation
C.be stopped in an appropriate distance
D.All of the above -
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A vessel shall be deemed to be overtaking when she can see at night（）.
A.only the sternlight of the vessel
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A vessel reduces speed without backing. The rate that her speed through the water decreases depends primarily on the（）.
A.vessel's horsepower
B.sea state
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