单项选择题
Which Inmarsat system applies store-and-forward messaging?（）
A.Inmarsat-A B.Inmarsat-C C.Inmarsat-B D.Inmarsat-M
单项选择题 （）are operated as a secondary method of alerting in the GMDSS.
单项选择题 The maritime access code of telephone mode in INMARSAT-A terminal for the IOR is（）.
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.
