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 advantage of geostationary satellites is（）.

Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.

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

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.

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

The priority of EGC messages is classified by（）.

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

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