Originally Posted by
air pig
Thank you for your comments, would they need to be placed in a chamber in the event of such an ascent?
No, definitely not. Inside the sub, they are at 1ATA, so have no deco obligation. They would just ascend from depth - so would have a "bottom time" too short to have any deco obligation.
The Oberon class had an escape compartment which was used for underwater escape but also egress. You can read how it was used here:
https://maritime.org/doc/oberon/escape/index.htm#pg12