A.A continuous sounding with any fog signal apparatus
B.A signal sent by radiotelephone consisting of the spoken word Mayday
C.An International Code Signal of N.C
D.The firing of green star rockets or shells
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A.a distinctive signal
B.the Morse Code signal for SOS
C.a computerized voice announcement of Mayday
D.your vessel's International Radio Call Sign
A.Control bleeding
B.Reduce pain
C.Immobilize a fracture
D.Reset the bone
A.An amount equal to the depth of the water
B.Two times the depth of water
C.Three to four times the depth of water
D.Five to seven times the depth of water
A.Carbon disulfide
B.Ethyl alcohol
C.Isoprene
D.Oleum
A.distance
B.largeness
C.diameter
D.measurerment
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We have no steel wire．You had better（）us one.
To develop maximum anchor holding power，the optimum angle between the anchor’s shank and the mooring lines is（）.
There is not（）depth of water around the area centered at the lighthouse.
The best method to stop a vessel from dragging anchor in a sand bottom is to（）.
What is required to launch a boat stowed in a crescent davit?（）
There is plenty of（）at this area.
What form of ice is of land origin?（）
What is normally used to pass a mooring line to a dock?（）
The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word（）.
The use of the danger signal（）.