单选题The use of the danger signal（）.Areplaces directional signalsBmakes the other vessel the stand-on vesselCindicates doubt as to another vessels actionsDis the same as a MAYDAY signal
单选题
The use of the danger signal（）.
A
replaces directional signals
B
makes the other vessel the stand-on vessel
C
indicates doubt as to another vessels actions
D
is the same as a MAYDAY signal
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