There was no recorded wreck at this location so it was reported into the pertinent authorities, such as the Receiver from the Wreck (RoW). They ended up deemed fantastic boats. During the war 8 were sunk, three surrendered and were being sooner or later scrapped, and two were regarded missing. https://tysonbyxsj.blue-blogs.com/41471730/the-basic-principles-of-u31