Gilldiver
Contributor
If it is a Soviet tank unit, it is not for escaping a tank - it is for operating in a tank in a Nuclear, Biological, or Chemical warfare (NBC) environment. The US tries to seal up a tank to keep the crew safe but the soviets decided it was cheaper and easier to just not try to seal the tanks and give the crew O2 rebreathers.
As for a Submarine escape, many navies used a O2 rebreather. Remember, it is for use on a one way trip to the surface at somewhere over 120 feet/minute. Total time at depth on 100% O2 was minor and if you are getting out of a sub that is stuck on the bottom, what is your real choice?
The US Navy had 2 escape trainers at something like 150' tall and part of every squids training was a controlled accent on the apparatus.
As for a Submarine escape, many navies used a O2 rebreather. Remember, it is for use on a one way trip to the surface at somewhere over 120 feet/minute. Total time at depth on 100% O2 was minor and if you are getting out of a sub that is stuck on the bottom, what is your real choice?
The US Navy had 2 escape trainers at something like 150' tall and part of every squids training was a controlled accent on the apparatus.
