The priority of EGC messages is classified by（）.

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

Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.

As each MSI message will have a unique identity, the printing of messages already received correctly is（）.

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

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.

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.

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

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