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An icebreaker may use the code letter “K” to remin...

海船船员考试

单选题

An icebreaker may use the code letter “K” to remind ships of their obligation to listen continuously on their radio. This signal may be made by any of the following EXCEPT（）.

发布日期：2021-03-22

A.sound signal

B.light signal

C.visual signal

D.radiotelephone

标签： icebreaker code letter remind ships

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