There was no recorded wreck at this spot so it was described towards the relevant authorities, including the Receiver with the Wreck (RoW). U-31 evaded a distribute of four torpedoes fired by HMS Trident about 15 miles (24 km) south of Lorient and was then compelled to dive when fired https://jeffreypjwkf.yomoblog.com/40749298/u31-can-be-fun-for-anyone