（）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.

What following is not among the function of SOLAS ships?（）

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

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

Please use（）for（）.

The priority of EGC messages is classified by（）.

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.

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

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.

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.