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.

International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.

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

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

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

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

Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）

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

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

The priority of EGC messages is classified by（）.