Radio beacon can be activated（）in case of distress.

As each MSI message will have a unique identity, the printing of messages already received correctly is（）.

The vessel has stayed in port for seven days because she needs（）.

（）will form the basis for distress alerting and safety calling.

Radio communication（）for many years and helps to save tens of thousands of lives.

The rescue coordination center may（）on stations which interfere with traffic.

Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.

We consider（）send a helicopter with medical facilities to the distress area.

Please use（）for（）.

Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.