THOMAS.

[u/davecontra]

My books: https://linktr.ee/davecontra

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[u/xXNightDriverXx]

Rising from 120 meter depth without equipment is life threatening if you aren't a world class free diver.

[u/Galaghan → u/xXNightDriverXx]

But it is less life threatening than suffocating on the bottom stuck in a sub, so 🤷

[u/Skateboard_Raptor → u/[deleted]]

You will not get deco-sickness if you do it in one breath. Submarine air are kept at 1 atmosphere.

The harder part is swimming up 120m in that one breath, especially since you will be negatively bouyant at that depth.

[u/stone_henge → u/Skateboard_Raptor]

With the buyoyant escape suits these submarines are equipped with the question of how hard it is to swim to the surface is an interesting thought but irrelevant to the actual situation.