There was no recorded wreck at this locale so it had been claimed to the pertinent authorities, including the Receiver of the Wreck (RoW). They had been deemed exceptional boats. Over the war 8 ended up sunk, 3 surrendered and were being finally scrapped, and two ended up thought of https://u3113456.theisblog.com/34368729/u31-things-to-know-before-you-buy