Facebook group PureUP posted these shipwreck photos with the detailed story behind them.
"Isle Royale’s (National Park's) Five Finger Bay tug has remained an enduring mystery since it was first spotted by seaplane pilots in 1976 lying in the southernmost finger of Five Finger Bay. The tug was remarkably intact, being well-protected in the confines of the narrow bay where she lies in 15 feet of water. - PureUp post.
But this only a tip of the story. The original examination by divers in 1976 provided more questions than answers. They surmised the small wooden boat was a work tug and not a fish tug. Divers did find a 1920 Michigan boat license plate, but that turned out to be a dead end as many of Michigan's early records were destroyed by fire. The gasoline engine on it could be narrowed down to somewhere between 1902 and at least 1920.