单项选择题
A.have received B.have been received C.are received D.are being received
The beacon located on board aircraft is termed（）.A.EPIR...
单项选择题The beacon located on board aircraft is termed（）.
A.EPIRB B.PLB C.ELT D.MCC
（）is capable of finding any 406MHZ beacons no matter wh...
单项选择题（）is capable of finding any 406MHZ beacons no matter where they are.
A.Local User Terminal B.Spacecraft C.Local-mode coverage D.Near polar orbiting satellites
The COSPAS-SARSAT 406MHZ system was adopted as an eleme...
单项选择题The COSPAS-SARSAT 406MHZ system was adopted as an element of the GMDSS by IMO in（）.
A.1992 B.1980 C.1984 D.1988
