I’m guessing it’s possible. I think WSPR supports a wide selection of bands so you can have over the horizon comms. APRS is usually VHF/UHF so it’s mostly line

I’m guessing it’s possible. I think WSPR supports a wide selection of bands so you can have over the horizon comms. APRS is usually VHF/UHF so it’s mostly line of sight. On land, there are APRS repeaters that rebroadcast your signal at higher power so I’m guessing it’s more suited for land.