[Digital (406 MHz) Beacons] GEOSAR provides nearly-instantaneous coverage 70 degrees north and south of the equator Worldwide coverage via LEOSAR – 6 satellites For 406 signals, LEOSARs do not have to be in sight of a LUT to relay a distress message to Cospas-Sarsat. Once a 406 signal is detected by a satellite, the satellite will "dump" this data towards Earth (thus to all LUTs) for 24 hours. Future use of GNSS satellites will allow worldwide real-time coverage (MEOSAR) [Analog (121.5 MHz) Beacons] 
No detection by search and rescue satellites (coverage ended February 2009)