Pressure breathing
I'm too many years out of the military game to have access to current information "in-house", but would find it handy to know what the current state of the art, if there is one, looks like for high altitude aircraft pressure breathing systems.
Is anybody able to point me at any accessible documents, or tell me the general arrangement and numbers (pressure, flow, etc.) of current pressure breathing systems, and what they're being used on?
G