單項選擇題

The maritime access code for the IOR is（）in INMARSAT-A Telex Service.

A.581
B.582
C.583
D.584

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單項選擇題

In Inmarsat-A, “Priority 3” means（）communication.

A.routine
B.distress
C.urgency
D.safety

單項選擇題

Who has permit the SES enter the system after successful commissioning?（）

A.Network
B.The CES preferred by the applicant
C.INMARSAT
D.The SES itself