There was no recorded wreck at this location so it had been documented into the applicable authorities, including the Receiver from the Wreck (RoW). They had been considered great boats. Through the war 8 were being sunk, 3 surrendered and have been eventually scrapped, and two were regarded missing. Now https://u3122120.glifeblog.com/33093206/not-known-factual-statements-about-u31