There was no recorded wreck at this spot so it was noted to your appropriate authorities, including the Receiver on the Wreck (RoW). U-31 evaded a distribute of four torpedoes fired by HMS Trident about 15 miles (24 km) south of Lorient and was then forced to dive when fired https://trevoruabzs.blogkoo.com/the-basic-principles-of-u31-53538997