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Explainer - Missing Titanic submersible: what is the Titan tourist sub and what might have happened to it? (12ft.io)

submitted 1 year ago by Los to c/news

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[–] interolivary 16 points 1 year ago* (last edited 1 year ago)

Nitrogen-induced hypoxia is painless, but in a sub like that CO^2^ might turn out to be a big problem, and that is not painless.

But yeah, the pressure vessel is (or, probably, was) fiberglass. It's cheap to use but once it cracks it'll absolutely shatter – this is why "real" subs tend to use metal – and that's pretty much what I assume has happened. Either that or they've been bobbing on the surface with their air slowly running out, because the hatch can't be opened from the inside.