Sorry for the late reply, thank you for this helpful info. I will try to get to the shipwreck site in the next few days.I know this an old thread but there is a neat shipwreck off lime island in the Uppper Penisula on the Saint Mary's river that is visible. It is located just outside the harbor on the south side of the island. There is also a ship wreck on the west side of South Manitou island where much of the ship sticks out of the water. Both are fun places to visit.