Ship-to-ship distress alerting should be conducted by（）.

At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.

The rescue coordination center may（）on stations which interfere with traffic.

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

Before GMDSS, if the radio officer on board is serious ill,（）.

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

We consider（）send a helicopter with medical facilities to the distress area.

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

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

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