单项选择题
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
单项选择题 My ship（）that port next month.
单项选择题 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? （）
单项选择题 If it（）fine tomorrow，we shall start unloading.
