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

Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.

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

Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.

Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）

（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.

Before GMDSS, if the radio officer on board is serious ill,（）.

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

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

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