A.on
B.at
C.in
D.above
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A.Standing by on VHF frequency
B.Coming to VHF frequency
C.VHF frequency. is the best place for you to stay by
D.remaining in frequency. and do not change
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
A.on
B.in
C.at
D.up
最新試題
Should that kind of weather（），the two ships would touch each other.
I am ready（）tow line.
There is a drifting mine（）in position 21 degrees 31 minutes North 124 degrees 20 minutes East.
Some goods are missing（）terrible weather.
A mark or place at which a vessel comes under obligatory entry，transit，or escort procedure is know as（）.
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（）.
（）both anchors.
The space in Hatch No.4 tweendeck is too（）.
A call between any two ship stations on an intership working frequency shall have a maximum duration of（）.
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? （）