Sky News understands two others on board the vessel are French submersible pilot, Paul-Henry Nargeolet, and chief executive and founder of OceanGate Expeditions, Stockton Rush.
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UK billionaire Hamish Harding on board missing Titanic submersible, family confirms
The vessel, which began its dive towards the Titanic wreck on Sunday morning, lost contact with the research vessel Polar Prince an hour and 45 minutes into the dive, according to the US Coast Guard.