Do you require any further assistance ? My ship is safe now and no assistance is necessary.This VHF communication generally takes place during（）.<br>A:salvage operation<br>B:cargo discharging<br>C:bunkering<br>D:towing operation

Do you require any further assistance ? My ship is safe now and no assistance is necessary.This VHF communication generally takes place during（）.
A:salvage operation
B:cargo discharging
C:bunkering
D:towing operation

出自：海船船员证

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