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單項選擇題

（）process the distress signal from EPIRB to determine its position and identity.

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

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單項選擇題

It is（）for mariners to combine the SART with a float-free satellite EPIRB.

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

單項選擇題

（）is a space system using one or more artificial earth satellites.

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

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