Pentagon officials say the object was shot down 15 nautical miles east of the upper peninsula and likely landed on the Canadian side of the lake.
In a statement, the U-S Northern Command says they used airborne imagery and subsurface scans to try and locate the object.
John O’Shea is a professor of archeology at the University of Michigan and studies the bottom of Lake Huron. He says underwater autonomous vehicles can provide a detailed map of a square kilometer in a few hours, and the military should have some of the best equipment around
“Their assets are way, way, way beyond anything we have... my guess is it's rather; they've decided it's not worth spending the time and effort to find it.”
The Department of Defense and Coast Guard did not respond to multiple requests for comment.