It’s meant for life vests worn in the water, and connects to the Cospas-Sarsat distress signal network. The Cold War-era system consists of radio beacons on aircraft, ships and satellites, networked with ground receivers and search-and-rescue centers. A ship, plane or person can activate an emergency distress beacon, which transmits a signal that satellites can detect. The satellites report the distress call’s location to rescuers nearby, who can use it to narrow down their search area.
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