The maritime access code of telephone mode in INMARSAT-……

单项选择题In Inmarsat-A, “Priority 0” means（）communication.

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

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

单项选择题In Inmarsat-A, “Priority 3” means（）communication.

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

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

单项选择题After successful commissioning, the（）will permit the SES access to system.

A.INMARSAT
B.IMO
C.MSC
D.CES