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.

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

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.

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

（）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.

All coast radio stations（）DSC installed for VHF and HF.

Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.

Distress traffic is the communication（）between the station in distress and the ships, aircraft, coast radio stations, coast earth stations and rescue centers participating in the rescue work.

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