The network stack used in this article is called Reticulum. Reticulum can operate over really any medium that has a MDU of 500 bytes, and a throughput greater than 5 bits.

I've performed this exact test using two HF radio nodes equipped with NVIS antennas operating on the 40 meter band, with each radio 144 km (90 miles) separate in distance. Node 1 was out in the field while Node 2 was back at my house. Node 2 was able to act as a bridge to the outside TCP Testnet. https://www.youtube.com/watch?v=blwNVumLujc