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

Please use（）for（）.

Before GMDSS, if the radio officer on board is serious ill,（）.

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

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

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.

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

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.

Ship-to-ship distress alerting should be conducted by（）.

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.