單項(xiàng)選擇題Before entering the chain locker，you should（）.
A.have someone standing by
B.make sure there is sufficient air within the locker
C.de-energize the windlass
D.All of the above
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1.單項(xiàng)選擇題According（）the report，the ship hit the wharf when berthing.
A.of
B.to
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2.單項(xiàng)選擇題A vessel showing a yellow light over a white light at night is a vessel（）.
A.engaged in piloting
B.towing astern
C.engaged in fishing
D.in distress
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