This is not how salvage works, unfortunately. First off, the boat needs to be in actual peril, as in headed for rocks (a sandy beach is not peril for a boat). Secondly, you don't get the boat; after salvage, you're able to place a salvage lien on the boat, which means that the boat's owner owes you a certain amount of money for your salvaging service. If it worked the way you're thinking, anybody could steal a boat, tow it out to international waters, tow it back, and boom it's theirs.Tow it out, "find it" tow back in under salvage rights laws. Google maritime laws for international water salvage rights & you should be good. Having to pay a mainland gov fee on a clearly abandon piece of property the original owner & the gov does not care about, of course until you want it, is ridiculousness.