SOLAS ships shall be equipped with（）.

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

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

The rescue coordination center may（）on stations which interfere with traffic.

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.

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

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

If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.