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單項選擇題

One hour before arrival at Elbe 1 light vessel，masters are advised to contact the pilot boat by（）.

A.telephone
B.telegraph
C.telex
D.VHF

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單項選擇題

My ship（）that port next month.

A.calls at
B.has called at
C.call at
D.will call at

單項選擇題

If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies，which frequency should you call on? （）

A.Calling frequency
B.Distress frequency
C.Urgency frequency
D.Working frequency