Actually in the real subs is there is a short term leaking issue....then the depth actually tightens the hull and fitting areas until the leaking stops. Next things happen rather rapidly...imagine standing on a soda can, It will support your weight, and all will be fine....right up until something very small deforms that can, compromising its structural integrity.....CRUNCH!

Kind of the same principal....approaching crush depth puts strain on the entire exterior surface of the sub EVENLY but all it takes is one small part to buckle...and game over.

I myself have never experienced this of course, but during the course of my Military career I had the chance to hop a few sub rides, extracting from one is great fun, and met a few sub capt....thats how they explained it to me.


Recon