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

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

SOLAS ships shall be equipped with（）.

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

COSPAS-SARSAT is intended to be used for（）.

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

On-scene communications will normally take place between（）.

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

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

Please use（）for（）.