单项选择题
If a DSC distress relay is transmitted from coast station , it will（）.
A.indicate the ship in distress that the alert has been received B.alert ships in the area of a distress incident that a distress has occurred C.inform other coast station of distress incident D.repeat the distress alert in 5 minutes
单项选择题 EGC is a（）part of INMARSAT-C.
单项选择题 Distress signal are always stored in the memory so as to start（）.
单项选择题 Which Inmarsat system applies store-and-forward messaging?（）
