Quote: (Originally Posted by
Sutty)
I don't understand the reason for O/C on the descent, having gone to some efforts to warm up the scrubber why leave it to chill again before breathing it on the dive?
It's to avoid the PO2 drop in the shallows.
I was diving nitrox in that video, so it's not much of a concern, but if I had a low PO2 trimix, then the drop could put me hypoxic.
I think that dive was my 4th on the RB80 since my course, so I'm still trying to build all the good habits, like descending on OC, etc. I'd like to get a little more knowledge and experience under my belt before I consider deviating from the instructor's recommendations.
Steve