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

Please use（）for（）.

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

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

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

SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.

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.

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

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

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