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(FILES) This file picture taken on May 31, 2013 in Paris shows Paul-Henri Nargeolet, director of a deep ocean research project dedicated to the Titanic. Paul-Henry Nargeolet is one of the five passengers aboard a missing submersible that had been due to take passengers to visit the wreckage of the Titanic on June 19, 2023. The craft began its descent but lost contact with the surface less than two hours later, according to authorities. Fears are growing for the five people onboard as the vessel only has oxygen for up to 96 hours. (Photo by Joël SAGET / AFP)