Jeff, I've dived on a number of wrecks in the Bay. Old wooden wrecks usually give very little clue they're there. Most are below or just flush with the surface. Couple of tiny little worn frames or strakes breaking the surface of the sandy mud, and that's it. The visibility is usually no better than 6 feet, and often less. You find yourself in a light green world. Lose contact with your anchor line or the bottom and you're lost in space. Add a bit of current and it can get dicey. Only thing to do is inflate the BC and try to surface close to the boat -- for some reason, dive flags on the Bay act as an attractor for recreational boaters! There are hundreds and hundreds of wrecks in the Bay. Oystermen pull up artifacts and generally know where wrecks are. I've got a fine ship's bell that I purchased on the Eastern Shore years ago that likely came up in a dredge. Head boat captains often park themselves on old ballast piles because they hold rockfish. The stuff's there -- question is how hard you want to work for it while complying with Maryland's shipwreck law, which is (as such laws go) fairly reasonable but prohibits the kinds of excavation that the Florida crews use.