Paul-Henri Nargeolet, a 77-year-old French explorer, is another person reportedly on board. He is the director of underwater research at a company that owns the rights to the Titanic wreck.
A former commander in the French navy, he was both a deep diver and a minesweeper. After retiring from the navy, he led the first recovery expedition to the Titanic in 1987 and is a leading authority on the wreck site.
The fifth person reportedly on board is Stockton Rush, the founder and CEO of OceanGate.
"It is an amazingly beautiful wreck," Rush told Britain's Sky News of the Titanic earlier this year.
Rush became the youngest jet transport rated pilot in the world when he obtained his DC-8 Type/Captain's rating at the United Airlines Jet Training Institute in 1981 at the age of 19, according to his biography on OceanGate's website.
What might have happened?
Alistair Greig, a professor of marine engineering at University College London, said that submersibles typically have a drop weight, which is "a mass they can release in the case of an emergency to bring them up to the surface using buoyancy".
"If there was a power failure and/or communication failure, this might have happened, and the submersible would then be bobbing about on the surface waiting to be found," Greig said.
Another scenario is a leak in the pressure hull, in which case the prognosis is not good, he said.
How might it be recovered?
If the Titan has gone down to the seabed and cannot get back up under its own power, options are very limited, Greig said.
"While the submersible might still be intact, if it is beyond the continental shelf, there are very few vessels that can get that deep, and certainly not divers," he said.
Even if they can go that deep, he doubts they can attach to the hatch of OceanGate's submersible.
David Concannon, an adviser to OceanGate, told the Associated Press on Monday that officials are working to get a remotely operated vehicle that can reach a depth of 6,000m to the site as soon as possible.
https://news.google.com/rss/articles/CBMidWh0dHBzOi8vd3d3LmNoYW5uZWxuZXdzYXNpYS5jb20vd29ybGQvbWlzc2luZy1zdWJtZXJzaWJsZS10aXRhbmljLWV4cGVkaXRpb24td2hhdC13ZS1rbm93LWJyaXRpc2gtYmlsbGlvbmFpcmUtMzU3NDI0NtIBAA?oc=5
2023-06-20 11:01:00Z
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