The Coast Guard said Paul-Henri Nargeolet, a noted explorer who was aboard the submersible when it imploded, is believed to have been sending the final round of messages. The last one, just seconds before contact was cut, was apparently about the vessel dropping weights while near the Titanic.

Friday marked the last day of testimony in the U.S. Coast Guard Marine Board of Investigation's two-week hearing into the June 2023 implosion of OceanGate's Titan sub.

The Titan‘s support ship master reported feeling his vessel shudder around the time communication was lost with the ill-fated submersible. On Friday, September 27, during a two-week hearing by the U.S.

Materials engineer Justin Jackson clarified that the agency's involvement was minimal, limited to early consultations on a mockup.

OceanGate co-founder Stockton Rush said the carbon fiber hull used in an experimental submersible that imploded was developed with help of NASA and aerospace manufacturers, but a NASA official said Thursday that the agency had little involvement and a Boeing official said some recommendations were ignored.