COSPAS-SARSAT is intended to be used for（）.

The advantage of geostationary satellites is（）.

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

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

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

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

International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.

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（）.

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