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A.Navigational broadcast
B.weather forecast
C.Urgency message
D.Maritime Safety Information

A.Lifeboat
B.A survival craft
C.An EPIRB
D.A SART

A.COSPAS-SARSAT
B.Ground receiving stations
C.storing distress signal
D.Near-polar orbiting satellites

A.essential
B.compulsory
C.optional
D.inadvisable

A.Satellite network
B.Satellite link
C.GMDSS
D.Satellite system

A.easy/reliable
B.difficult/cheap
C.stable/compulsory
D.easy/expensive

A.MCC/LUT/RCC
B.LUT/MCC/RCC
C.LUT/RCC/MCC
D.LUT/RCC/LUT

A.at sea
B.on land
C.in the air
D.throughout the world

A.COSPAS-SARSAT
B.ground receiving stations
C.spacecraft
D.satellite SAR instrument

A.anywhere in the world
B.at sea
C.in the air
D.ashore