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（）.

I’d like to know something about the cargo condition at the loading port（）detail.

Should that kind of weather（），the two ships would touch each other.

How should the letter O be pronounced when spoken on the radiotelephone?（）

（）your present speed?

The height of a VHF radio antenna is more important than the power output wattage of the radio because（）.

The weather is often（）in a high-pressure area.

What does the abbreviation VHF stand for?（）

There is a drifting mine（）in position 21 degrees 31 minutes North 124 degrees 20 minutes East.