Which spoken emergency signal would you use to call a boat to come assist a man overboard?（）<br>A:Distress signal<br>B:Urgency signal<br>C:Safety signal<br>D:None of the above

Which spoken emergency signal would you use to call a boat to come assist a man overboard?（）
A:Distress signal
B:Urgency signal
C:Safety signal
D:None of the above

出自：海船船员证

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