[margalabargala]

Just make it out of carbon fiber. That's what they did with that uncrushable submersible that went to the Titanic.

[UncleEntity]

I'm pretty sure the issue was with 'move fast and break things' and not using carbon fiber.

I think it was on the youtubes I was watching a story about how they built that thing and it was <spoiler alert> not really fit for purpose. I mean, no big surprise in hindsight.

[jjmarr]

Carbon fibre has poor compressive strength and good tensile strength.

That makes it inherently bad at holding pressure from outside in a submarine and good at holding pressure inside a spaceship or airplane.

[IAmBroom]

Designed, paid for, and piloted by a complete jackass, but... He never claimed it was uncrushable. He claimed it was safe.

Still completely wrong about that, obv.