Complex sentence: The design of distress beacons as a whole has evolved significantly since 1982; the newest 406-MHz beacons incorporate GPS receivers; such beacons transmit highly accurate positions of distress almost instantly to SAR agencies via Cospas-Sarsat satellites.
Split into simpler sentences: The design of distress beacons as a whole has evolved significantly since 1982. The distress alert and location are forwarded almost instantly to SAR agencies via Cospas-Sarsat satellites.