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

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

The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.

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

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

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

For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.

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.

What following is not among the function of SOLAS ships?（）

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.