Every lifeboat which is fitted with a fixed two-way vhf radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.

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

Ship-to-ship distress alerting should be conducted by（）.

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.

The priority of EGC messages is classified by（）.

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

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

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

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

By using（）system a ship can send a distress message and know with certainty it will be received.