As an aside, I was doing reserve duty with VP-60 at NAS Glenview bach in the late 70's when one of the P-3 crews found the wreck of the Lady Elgin. They had been doing MAD runs looking for some WWI German subs that had been scuttled off Chicago when they came across a large contact that was later identified as the Lady Elgin's powerplant. She's a lot further north and west than originally presumed.