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

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

（）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.

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.

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

Radio communication（）for many years and helps to save tens of thousands of lives.

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

Radio beacon can be activated（）in case of distress.

Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.