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

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

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

（）will form the basis for distress alerting and safety calling.

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

SOLAS ships shall be equipped with（）.

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.

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.

（）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.

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