单项选择题
A light signal consisting of three flashes means （）.
A.I am in doubt as to your actions
B.My engines are full speed astern
C.I desire to overtake you
D.I am operating astern propulsion
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相关考题
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单项选择题
A liferaft which has inflated bottom-up on the water（）.
A.should be righted by standing on the carbon dioxide cylinder，holding the righting straps and leaning backwards
B.should be righted by standing on the life line，holding the righting straps leaning backwards
C.will right itself when the canopy tube inflates
D.must be cleared of the buoyant equipment before it will right itself -
单项选择题
A lifeline must be connected to the liferaft （）.
A.at the bow
B.at the stern
C.in the middle
D.all around -
单项选择题
A life float on a fishing vessel must be equipped with （）.
A.a painter
B.red smoke flares
C.a jackknife
D.a signal mirror
