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

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

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

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

（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.

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.

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.

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

Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.