Paul-Henri Nargeolet

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.

Nargeolet was born in the French department of Haute-Savoie. He lived in Casablanca, Morocco, for 13 years before relocating to Paris to complete his studies at age 16.

Nargeolet began his career in the French Navy, where he served as an officer specialising in mine clearance, diving, and deep underwater intervention from 1964 to 1986.

In 1986, he joined the French Research Institute for the Exploitation of the Sea.  With IFREMER, Nargeolet piloted dives to the Titanic wreck site in 1987, 1993, 1994, and 1996. His 1987 expedition was the first to collect artefacts from the wreckage.

Beginning in 1994, Nargeolet was director of Michigan State University's Center for Maritime & Underwater Resource Management (CMURM).

From 1996 to 2003, Nargeolet worked with Aqua+, a subsidiary of Canal+, whose objective is to produce underwater films. During his time with the company he directed the underwater missions of two submarines.

As an expert on the Titanic , Nargeolet participated as a creator of two documentaries, Titanic: The Legend Lives On (1994) and Deep Inside the Titanic (1999). In 2022, he published the book Dans les profondeurs du Titanic (In the Depths of the Titanic), which recounts his expeditions.

He was married to U.S. television reporter Michele Marsh until her death in 2017.