A.a floating wreck
B.a survivor at sea
C.a man who had fallen overboard
D.a drilling rig
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A.a message about the safety of navigation will follow
B.a message of an urgent nature about the safety of a ship will follow
C.the sender is in distress and requests immediate assistance
D.you should secure your radiotelephone
A.Safety message
B.Urgency message
C.Distress message
D.Routine message
A.at
B.on
C.in
D.above
最新試題
The most likely time for oil pollution while bunkering is when（）.
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Which method is used to detect rot in manila lines?（）
Which may ignite fuel vapors?（）
The winch at Hatch No.3 is（）trouble.