As i understand it, when i used to work on Singer Island we had a few "strays" that bumped around, or found their way to shore and this qualified for some kind of salvage
rights to the person/s responsible for rounding them up. kinda' like we used to do the wild cows here in Florida
back in the 1800's. i have personally seen someone lay claim to a drifting vessel, though don't know if they held that claim or not.
DOT and FFW would definetely be the ones to talk to on this, but if it is tied up/anchored their might be stipulations to the salvage thing. the fact that it has no registration
info is wierd, and this may be a tough thing to work with regarding the title search, unless you have a hull number that is readable. i would think that a closer inspection
is in order here. i think you are on to something.
it's not unlike a rich NYer to come down in season, buy a cheap
sailboat to party on and take pictures and leave it 'til next season or for good...heehee
good luck, for sure! let us know what the REAL laws are behind this kinda thing.