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The generators on your ship have shut down，leaving you without navigation lights.Which emergency signal would you transmit over the VHF radio to alert vessels in the area of your predicament ().

A.Mayday，Mayday，Mayday
B.Pan，Pan，Pan
C.Security，Security，Security
D.Lights out，Lights out，Lights out

试题出自试卷《航海英语丙类大副试题(1)》

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