I've never seen an actual map but it's hard to miss the things that are out there. Every significant location is marked by a buoy above water. Swim out, get to a buoy, look around, surface, look for the next buoy, then repeat. I know the Mickey statue is the farthest buoy out there. You gotta work for Mickey. I have a general idea of where everything is so I could maybe find a map like on Google Earth and try to mark it. I know if you look at satellite imaging you can make out the shape of the Nautilus that's out there.