Short answer is they used js8call. If you got your license, it is not terribly complicated to get up and running, especially if you already have the technical sophistication to hand nostr and/or Bitcoin. There are lots of great set up videos on YouTube for the software.
https://news.bitcoin.com/no-internet-no-problem-how-to-send-bitcoin-by-amateur-radio
HR4BTC / HR4BTC aka HamRadio4Bitcoin
npub1ya2…x9ty
2024-02-06 23:33:24
in reply to nevent1q…nd0t
Author Public Key
npub1ya20ep3dd0qt0suhzprxztv5y43arqwps73ercvqa44sp7qw0edsp4x9tyPublished at
2024-02-06 23:33:24Event JSON
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