There was no recorded wreck at this site so it was documented on the pertinent authorities, including the Receiver in the Wreck (RoW). U-31 evaded a unfold of four torpedoes fired by HMS Trident about 15 miles (24 km) south of Lorient and was then compelled to dive when fired https://u3103827.alltdesign.com/everything-about-u31-51727134