A.I am going to change to VHF channel
B.I am certainly going to change to VHF channel
C.Changing to VHF channel
D.VHF channel. has been changed
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A call between any two ship stations on an intership working frequency shall have a maximum duration of（）.
You are making a telephone call ship-to-shore using the VHF-FM service.You can tell that the working channel is busy if you hear（）.
I’d like to know something about the cargo condition at the loading port（）detail.
How should the letter O be pronounced when spoken on the radiotelephone?（）
The present voyage of my ship began at the port of Shanghai after loading 8 000 tons of Cargo on board and ended after discharging the Cargo at the port of Hong Kong，which was（）.
How（）the cargo at loading port?
Do you require any further assistance ? My ship is safe now and no assistance is necessary.This VHF communication generally takes place during（）.
The generators on your rig have shut down，leaving you without navigation lights. Which emergency signal would you transmit over the VHF radio to alert vessels in the area of your predicament? （）
One hour before arrival at Elbe 1 light vessel，masters are advised to contact the pilot boat by（）.
All VHF marine band radios operate in the simplex mode，which means that（）.