There was no recorded wreck at this place so it was reported for the pertinent authorities, including the Receiver in the Wreck (RoW). They had been regarded great boats. During the war eight have been sunk, 3 surrendered and have been at some point scrapped, and two have been regarded https://garrettuivfn.jts-blog.com/33123372/the-smart-trick-of-u31-that-nobody-is-discussing