The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.

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

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

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.

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

SOLAS ships shall be equipped with（）.

SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.

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.

Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.

All coast radio stations（）DSC installed for VHF and HF.