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

The frequency（）the safety message will be transmitted shall be included in DSC safety call.

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.

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

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

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

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（）.

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

（）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.