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

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

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

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.

At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.

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.

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

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

Radio communication（）for many years and helps to save tens of thousands of lives.