The vessel has stayed in port for seven days because she needs（）.

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

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

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

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

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

In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.

On-scene communications will normally take place between（）.

（）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?（）