单项选择题
After launching，an inflatable raft should be kept dry inside by（）.
A.opening the automatic drain plugs
B.draining the water pockets
C.using the electric bilge pump
D.using the bailers and cellulose sponge
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相关考题
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单项选择题
A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.
A.distress position
B.spoken words Mayday，Mayday，Mayday
C.ship's name
D.ship's call letters -
单项选择题
A distress signal（）.
A.consists of 5 or more short blasts of the fog signal apparatus
B.may be used separately or with other distress signals
C.consists of the raising and lowering of a large white flag
D.is used to indicate doubt about another vessel's intentions -
单项选择题
AS SOON AS I HAVE FURTHER INFORMATION I WILL MAKE ANOTHER ANNOUNCEMENT. I ASK YOU KINDLY TO REMAIN CALM. THERE IS NO DANGER AT THIS TIME. These words are likely from（）.
A.the captain of a vessel in distress
B.representative of ship owners
C.an officer from port authorities
D.the pilot of a vessel entering a port in foreign country
