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by leastonce 1574 days ago
https://www.wired.com/2009/04/fleetcom/

Not legal but this is pretty trivial to do … a few bits of wire and a very cheap Chinese radio.

Other options are ham radio … hopefully the ham community will help with message relays.

Although from a safety perspective it’s trivial to triangulate transmissions and they could be come a target for attack.

Anyone transmitting, using satellite phones or starlink type devices should be aware of the additional risks.