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.

SOLAS ships shall be equipped with（）.

（）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.

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

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

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

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

The priority of EGC messages is classified by（）.

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

The advantage of geostationary satellites is（）.