单项选择题
Which is NOT a distress signal? （）
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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相关考题
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单项选择题
Which is a distress signal? （）
A.A triangular flag above or below a ball
B.The International Code Signal of distress indicated by "JV"
C.A green smoke signal
D.Flames on the vessel as from a burning tar barrel -
单项选择题
Which EPIRB transmits a distress alert that is received and relayed by an INMARSAT satellite?（）
A.Class A EPIRBs
B.Class B EPIRBs
C.L-Band EPIRBs
D.Category I EPIRBs -
单项选择题
Which condition represents the appropriate time for setting off distress flares and rockets? （）
A.At one hour intervals
B.At half hour intervals
C.Only when there is a chance of their being seen by rescue vessels
D.Immediately upon abandoning the vessel
