单项选择题
A.routine B.distress C.urgency D.safety
The maritime access code for the IOR is（）in INMARSAT-A ...
单项选择题The maritime access code for the IOR is（）in INMARSAT-A Telex Service.
A.581 B.582 C.583 D.584
In Inmarsat-A, “Priority 3” means（）communication.A.rout...
单项选择题In Inmarsat-A, “Priority 3” means（）communication.
Who has permit the SES enter the system after successfu...
单项选择题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
