We've got them here in South Cackalackey. State waters reach out 3 miles - Federal waters reach out 10. Everything else is "international waters."
We've also got four other things going for us: Lots and lots of history starting from the early 1500's (which includes a ton of wrecks from the Civil and Revolutionary Wars), the lay of the land which offers lots and lots of places for ships to founder, seasonal hurricanes which caused a lot of wrecks, and low-vis inland waters that give divers the impression that they'd be better off driving to Florida than diving here... Which means that a lot of this stuff is still undiscovered.
Check out our dive from this past weekend: The "City of Savannah," a 200-foot double-masted steamer that sunk during the Hurricane of 1893. She was built before the Civil War and is still full of all kinds of good stuff. She's virtually undived.
A photo of our side-scanner, as we're over the wreck:
http://www2.snapfish.com/slideshow/...6533160486/a=153836367_153836367/t_=153836367
A photo of a piece of the wreck sticking out of the water:
http://www2.snapfish.com/slideshow/...6533160476/a=153836367_153836367/t_=153836367
Interestingly, this piece - a part of the control system for the rudder of the boat - hasn't always stuck out of the water like that... It's raised up and is now sticking out as the wreck has settled after a hundred-plus years of corrosion. Apparently the other end of it is somehow levering this end up into the air, making the wreck really obvious.
With regard to the laws - on paper I will tell you to obey your local, state and national laws regarding shipwrecks and historical items. Off the record, I will tell you that submerged items are simply being torn apart by the ocean, pretty much every day, so take what you can before it's gone forever. If you have the opportunity to salvage something, do it, and do it with the commitment that you may have to conserve the item in order to keep it from turning into a pile of rust weeks after you remove it from the water.
When I do this, the things I've found are nobody else's business, as far as I'm concerned. I have never, nor will I ever, "notify" anyone of my finds under any circumstances. The idea that they have the right to "demand" something of my time and effort - then confiscate the item (and in some cases go back to the site to put it back) is amazing to me. These laws - and the thought processes that make them - are made by people who have zero understanding of history, "historical significance," the concept of "owership," and what happens to the item if it's left in place. When I'm asked about things I've recovered, the only response I give is, is "The answer is no." This is the response I give regardless of the question.
My experice with the abuse of these laws has left me with a deep distain for individuals who try to obtain my finds by hiding behind legalese. At best, I've seen items end up in a box in the basement of some random museum (usually for a fat donation to the "government"), on the attorney's mantle, or... Get this... In the garbage. The worst I've seen is the government paying one of their own officials to "go back to the site and return the item" to the bottom of the ocean. In one case I actually saw this happen, followed by a law passed two weeks later that allowed divers to pluck artifacts from the site legally. Thus, the item that they made such a huge legal stink about ended up in a Canadian tourist's pocket. Last I heard, the individual - not knowing it's historical significance - no longer knew the whereabouts of that particular artifact - a set of shackles from a slave ship sunk sometime around 1800.
If you find things, I suggest you do with it as you wish - display it, conserve it, sell it, auction it... Otherwise, keep your mouth shut about it or it'll bite you in the tail and leave you very, very disgruntled.
The truth is, on the ocean, regardless of juristiction, the only law is the law of nature, and the individual with the biggest gun wins. Period.
'Nuff said. Find your treasure and don't tell a soul.