I have a helix mooring with a chain coming up to my mooring ball and dropped the chain while removing the winter stick (the line snapped). So the chain is on the bottom of the river, at least 22 feet down. I have dragged with a grappling hook, and wonder if anyone has ever used a large magnet while searching for their chain. I have read of "retrieving magnets" used for collecting tools or artifacts in deep water...these items are much lighter than a chain. Has anyone used a magnet to find their chain? If I could locate it with a magnetic tied to a line, then maybe I could then raise it enough to grab it with the grappling hook... I've been told to continue dragging or just hire a diver but cost is a factor and thought a magnet might help. Suggestions?