You see an iceberg that has not been reported. What kind of radio message do you transmit to warn others?（）.<br>A:Safety message<br>B:Urgency message<br>C:Distress message<br>D:Routine message

You see an iceberg that has not been reported. What kind of radio message do you transmit to warn others?（）.
A:Safety message
B:Urgency message
C:Distress message
D:Routine message

出自：海船船员证

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