题目内容
When the transmissions of a radio station or a Decca chain, etc., have broken down, switch
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You are making ship-to-shore telephone calls on VHF. You should use the ______.
when you are steering on a pair of range lights and find the upper light is in line above
Vessel’s provisions refer to ______ of the vessel.
According to the navigation rules, all of the following are engaged in fishing except a vessel ______.
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