I am not an expert by any means, but I do know ships sank in the Great Lakes (remember the song, the Wreck of the Edmund Fitzgerald?) I recall years ago reading a story about a ship that was in a storm on Lake Erie. In the storm, the ship's captain mistook the lights of the former Avon Lake amusement park to be a lighthouse. It sank off somewhere off the coast of the town. I suppose it has been explored since then, though. Might be worth researching, tho.
p