There was no recorded wreck at this spot so it was documented to the appropriate authorities, including the Receiver from the Wreck (RoW). U-31 evaded a spread of 4 torpedoes fired by HMS Trident about 15 miles (24 km) south of Lorient and was then forced to dive when fired https://mariodbobo.blogprodesign.com/55482306/u31-fundamentals-explained