There was no recorded wreck at this site so it was documented to your related authorities, including the Receiver of the Wreck (RoW). U-31 evaded a spread of 4 torpedoes fired by HMS Trident about fifteen miles (24 km) south of Lorient and was then pressured to dive when fired https://u3191108.blogdomago.com/33036526/new-step-by-step-map-for-u31