Short slide deck on getting started with DAPNET – Decentralized Amateur Paging Network. Access to the Google Slide Deck Here
The Jupiter Research Foundation has an amateur radio club. And, that club has recently launched the HF Voyager on a Pacific journey from Hawaii to California. Enclosed in a waterproof housing onboard the HF Voyager is a HF (high frequency) HAM radio (an Elecraft KX3 in fact).