Paul-Henri Nargeolet (2 March 1946 – 18 June 2023) was a French deep sea explorer and Titanic expert. Known as "Mr. Titanic", Nargeolet was one of five people who died aboard the submersible Titan when it imploded underwater on 18 June 2023 close to the wreck of the Titanic. Description above from the Wikipedia article Paul-Henri Nargeolet, licensed under CC-BY-SA, full list of contributors on Wikipedia.