Nah, sometimes the entire sub implodes at once as it passes crush depth. And then there are the ones when the reactor goes bad…
The Maritime Museum at Sydney has an Oberon class sub (HMAS Onslow; still in the water, intact enough that it could plausibly be recommissioned if desired) that you can wander around in.
Worth a visit, but mind your head and shins. They ain’t roomy, and there are a lot of hard surfaces to bash into.
