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
单项选择题 The COSPAS-SARSAT 406MHZ system was adopted as an element of the GMDSS by IMO in（）.
单项选择题 COSPAS-SARSAT has the function of（）.
单项选择题 SafetyNet is a maritime safety information broadcast service offering（）on suitably equipped ships.
