Danger From Below: Action filled story about flying, and salvage on lake Superior

This is an exciting story about T.J. and his crew first searching for lost German gold from WW-2. That venture literally blows up in their faces when their anchor snags an anti-ship mine causing it to explode, and damages their vessel. Back in port to get the boat repaired, they find about some fighter aircraft that landed on ice covered Lake Superior in a blinding storm at the end of the war. The aircraft landed successfully only to have the ice break, and the planes sink 300 feet to the b...