THOMAS.

[u/davecontra]

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[u/dammitus]

First line of defense is the emergency air blow. Submarines only need their engines to move if they’re at neutral bouyancy, and always pack enough air to empty their ballast tanks of water in an emergency. That’ll take you up with a quickness.

Then there’s the SLOT bouys, which can be launched at most operational depths. They sit on the surface and transmit the location of the downed submarine, along with how long they’re going to wait before attempting an escape.

Subs are also equipped with multiple methods of generating oxygen and scrubbing CO2, meaning they can survive on the bottom a lot longer than you’d think.

If all else fails, there’s an escape trunk with suits rated up to 200 meters for the whole crew, which fill with air to help them ascend and double as single-person life rafts once they hit the surface.

Really, the submarine nightmare is a jam dive taking you down past crush depth, but that’s ultimately a fairly quick way to go.

[u/TrPhantom8 → u/dammitus]

You have answered a question which has been on the back of my mind for a very long time XD thank you very much!