There's some interesting history behind distress beacons that broadcast on 406 MHz without any subscription. It's a good example of successful Cold War cooperat

There's some interesting history behind distress beacons that broadcast on 406 MHz without any subscription. It's a good example of successful Cold War cooperation. https://en.wikipedia.org/wiki/International_Cospas-Sarsat_Programme https://en.wikipedia.org/wiki/International_Cospas-Sarsat_Pr...