Looks to me like APRS over HF. I used to dabble quite a bit in TCP/IP over HF back in the day, we even had a working email system between our ships before Sat C made it redundant. Codan used to make really nice HF modems, don't know if they still do, but you don't really need much gear to get started these days.
http://wa8lmf.net/APRS_PSK63/index.htm
Biz
npub1eh…szjqv
2024-09-14 17:31:50
in reply to nevent1q…l45v
Author Public Key
npub1ehhfg09mr8z34wz85ek46a6rww4f7c7jsujxhdvmpqnl5hnrwsqq2szjqvPublished at
2024-09-14 17:31:50Event JSON
{
"id": "550b967e0b214df227fcd2ec14139ad6b3f24636014c1bebbb95feaca6b12aff",
"pubkey": "cdee943cbb19c51ab847a66d5d774373aa9f63d287246bb59b0827fa5e637400",
"created_at": 1726335110,
"kind": 1,
"tags": [
[
"e",
"4568eb0b8178ce97aa130368af8333480aeb32b78f6bfcf78d656e44df8b081a",
"wss://relay.primal.net",
"root"
],
[
"e",
"3ec02011146ac007bdf12cd14dfbca8a4435c8dfacb2661c0aef34ab13e9c1b6",
"wss://relay.primal.net",
"reply"
],
[
"p",
"e88a691e98d9987c964521dff60025f60700378a4879180dcbbb4a5027850411"
],
[
"p",
"e56e78ba8f9428eb1b702ef6880810a03e1550790626007b8a551b0cb3cf1b59"
]
],
"content": "Looks to me like APRS over HF. I used to dabble quite a bit in TCP/IP over HF back in the day, we even had a working email system between our ships before Sat C made it redundant. Codan used to make really nice HF modems, don't know if they still do, but you don't really need much gear to get started these days.\n\nhttp://wa8lmf.net/APRS_PSK63/index.htm",
"sig": "15de79926fc963c14d4fd57de940c5e60b992e5467fde18d1088bfab24272337fa712f28af60377bd37288d2a6caf1a2f40b11f7b66ee54cc85d935ec7735066"
}