There was no recorded wreck at this spot so it had been noted on the applicable authorities, including the Receiver in the Wreck (RoW). They ended up deemed outstanding boats. Throughout the war 8 have been sunk, a few surrendered and were finally scrapped, and two have been deemed missing. https://griffinfterd.blogproducer.com/41186377/u31-things-to-know-before-you-buy