Quote: (Originally Posted by
DeepBlueInnovation)

n relation to the 02 question I believe 1litre per minute is the rough metabolism rate, so not taking into account sensor calibration or validation you would theoretically get 500 minutes on a single 19cf of oxygen.
Bear in mind this will depend on the profile of the dive, as you ascend more O2 will need to be injected into the loop in order to maintain set-point and if you then descend again dil will be injected in order to prevent an O2 spike. On top of that you'll be inflating/deflating wing and/or drysuit to maintain buoyancy and, at least in the beginning, blowing out gas to minimise counterlung volume. Particularly when diving with buddies on OC, I've found this can make the dive quite interesting
