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And the accidents… Those documentaries are in a category of their own. If there’s a massive pressure difference between two sides of a wall, all sorts of horrible things can happen. Pure nightmare fuel.
Delta V is not your friend.
In one documentary it was called Δp, for pressure. Either way, bad stuff.
Not to mention the things drifting around you in the darkness that you can’t see but can probably feel.
Yikes 😱
Are those the ones that spend long lengths of time at extremely high pressure and need to essentially live in a pressure vessel for the duration of their work?
That’s just one place with great pressure differences. It could also be water on two sides of a wall in a dry dock. Those accidents are equally disturbing.
Saturation divers. Something I didn't realize, they haul the pressure vessel to the surface at the end of every shift, they don't live at the bottom, but they're under pressure.