A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.<br>A:distress position<br>B:spoken words Mayday，Mayday，Mayday<br>C:ship's name<br>D:ship's call letters

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

出自：海船船员证

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