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

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.

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

Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.

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

（）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.

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

SOLAS ships shall be equipped with（）.

Please use（）for（）.

COSPAS-SARSAT is intended to be used for（）.