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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The weather is often（）in a high-pressure area.
The height of a VHF radio antenna is more important than the power output wattage of the radio because（）.
There is a drifting mine（）in position 21 degrees 31 minutes North 124 degrees 20 minutes East.
What is meant by veering the anchor chain? （）
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（）.
（）both anchors.
The space in Hatch No.4 tweendeck is too（）.
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? （）
The control of distress traffic is the responsibility of（）.
（），you can’t finish discharging tomorrow!