As time passes, more and more things that have gone wrong with the ill-fated submersible surfaces - And this is just one of them:So the last estimate now is 5 hours before oxygen is out. Beside that, the hull of the vessel is only 5 inches which is 2 inches less than the company engineers expected. Also safety is overrated says the missing CEO.
If this is proven to be true, perhaps the submersible would have already imploded (and the occupants crushed) by the immense water pressure down there even long before reaching the depth at which the Titanic rests:

Even if assuming that the submersible remained intact when it reached the seabed floor after losing contact with the surface ship, the remaining oxygen supply onboard would have ran out by now.
May all 5 occupants onboard RIP...
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