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

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

The priority of EGC messages is classified by（）.

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

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

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.

The advantage of geostationary satellites is（）.

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

SOLAS ships shall be equipped with（）.

Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）