单项选择题
A.Inmarsat-A B.Inmarsat-C C.Inmarsat-B D.Inmarsat-M
（）are operated as a secondary method of alerting in the...
单项选择题（）are operated as a secondary method of alerting in the GMDSS.
A.satellite EPIRBs B.Non-satellite EPIRBs C.SES and DSC
The maritime access code of telephone mode in INMARSAT-...
单项选择题The maritime access code of telephone mode in INMARSAT-A terminal for the IOR is（）.
A.871 B.872 C.873 D.874
When you have received GA+ from the CES for the INMARSA...
单项选择题When you have received GA+ from the CES for the INMARSAT-A telex communication, you should immediately select（）and（）you required.
A.an CES / telex mode B.an SES telex service C.the service /the subscriber D.a satellite /an ocean region
