A.85 B.86 C.412 D.570
A.DISTRESS ALTER B.URGENT CALL C.DISTRESS RELAY D.SAFETY CALL
A.1.6HZ衛(wèi)星示位標(biāo) B.406MHZ衛(wèi)星示位標(biāo) C.VHF緊急示位標(biāo) D.A或B都可以