Well, that narrows it down.
@bgannin @designatednerd Yeah, I was thinking of how indoor mapping is done, the problem would just be that as soon as the boat is treated as an indoor map, you lose any actual location information (i.e. where in the world the boat is).
Wondering if there is a way to tell a beacon its own geo coordinate, so ship GPS could update the beacons periodically to tell you what country you're in?