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问题详情

A mobile offshore drilling unit under tow is approaching a fog bank. When should fog signals be started? （）

A、When the towing vessel enters the fog

B、When the drilling rig enters the fog

C、When the towing vessel can no longer be seen from the rig

D、Immediately

时间：2021-12-31 19:25 关键词：航海出版物

答案解析

D

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