If you wished to transmit a message by voice concerning the safety of navigation，you would preface it by the word（）.<br>A:Mayday<br>B:Pan-pan<br>C:Securite<br>D:Safety

If you wished to transmit a message by voice concerning the safety of navigation，you would preface it by the word（）.
A:Mayday
B:Pan-pan
C:Securite
D:Safety

出自：海船船员证

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