Starlink RV is $135/m and looks exactly the same. I wonder what happens if I put one on the boat? Will Starlink turn it off for usage violation?
(Inland lakes should work fine except perhaps for the very biggest ones like Lake Superior or the Caspian Sea. If lakes don't work with the RV plan, it's not for any technical reason.)
Intersat (laser links) comms is not available at the moment. Fairly sure they simply geofence non-maritime accounts. As you can see from the maritime map, it only covers water next to the shore which is a good indicator that they still use ground stations directly to provide service.
EDIT: looks like it's not geofenced based on some other people's comments who've been using the standard terminal on boats.