The U-550 was found Monday by a privately funded group organized by New Jersey lawyer Joe Mazraani. It was the second trip in two years to the site by the team, some of whom had been searching for the lost U-boat for two decades.
Using side-scan sonar, the seven-man team located the wreck listing to its side in deep water about 70 miles south of Nantucket.
The Wikipedia entry on the U-550 adds that there appear to have been men trapped in the sunken hull who tried to escape days after the sinking.
At 1515 on 5 May 1944, the Coastal Picket Patrol CGR-3082 recovered a body from the sea at 39° 51? NN. 71° 58? W., about 93 miles (150 km) ESE of Ambrose. The body was clothed in a German-type life jacket. From the markings on his clothing it was possible that the man’s name was “Hube”. A German escape lung was found near his body as well. An autopsy performed on the body indicated that the individual died only five days before his remains were discovered – U-550 had been sunk on 16 April, the corpse was found 19 days later.
Well, the group that found the wreck say it was in deep water, but give no details. According to this site, the deepest recorded escape from a sunken U-boat was 73 meters. One has to wonder if there actually were survivors escaping from the wreck some two weeks after the sinking. (That last link has the details of how primitive the escape apparatus was – and how unlikely it would be to actually get out at all.)