Shipwreck hunting can be very tedious work.
The Great Lakes Shipwreck Historical Society has searched well over 700 miles of the bottom of Lake Superior this year alone.
With the help of marine sonic technology, they are having a very good year.
And believe it or not, the shipwreck society has found three more wrecks this these three.
Corey Adkins explains in this week’s Northern Michigan In Focus.