There was no recorded wreck at this locale so it absolutely was reported for the relevant authorities, such as the Receiver of 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 forced to dive https://u3113008.blazingblog.com/34177524/the-definitive-guide-to-u31