There was no recorded wreck at this locale so it was documented to your pertinent authorities, including the Receiver on 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 forced to dive when fired https://u3167531.snack-blog.com/32236597/detailed-notes-on-u31