There was no recorded wreck at this location so it had been claimed for the relevant authorities, including the Receiver on the Wreck (RoW). They have been deemed outstanding boats. During the war eight have been sunk, 3 surrendered and were being finally scrapped, and two were viewed as lacking. https://u3100008.suomiblog.com/the-smart-trick-of-u31-that-nobody-is-discussing-49784790