There was no recorded wreck at this site so it was noted to the applicable authorities, including the Receiver of the Wreck (RoW). U-31 evaded a unfold of 4 torpedoes fired by HMS Trident about 15 miles (24 km) south of Lorient and was then pressured to dive when fired https://troyvslgz.blogsmine.com/32783977/the-2-minute-rule-for-u31