On dives to say 70m
I would run 1,3 bottom
when I get back to say 15m I tend to start to push up the ppo2 max 1.45
Always like to keep my cns clock round 85% or less .
But don’t mind going over 100% if need be
So after a 70m dive I would be back at 6m round 65min run time .55cns per min * 65mins = 36% on my clock and I would have 45mins deco to do a 6m if I push my ppo2 up to 1.6 I will go over my cns clock i.e. 2.2 cns per min * 45mins deco time to do = 99+36=135% on my clock ,
But if I keep my ppo2 at say 1.5 I get .83*45= 37+36=73% on my cns clock
I just keep 3 numbers in my head
1.6 = 2 cns per min
1.4 to 1.5 = 1 cns per min
1.3 set point gives me 6 cns per ten mins of use
That way I can do the numbers in my head and all ways have a good handle on my total CNS clock at all points of my dive .And can change my ppo2 to keep me in side my happy zone ,ps i have a vr3 that will keep track of cns as well ,
but to look 4ward i need my head
So to answer the question . 1.3 on bottom and push my ppo2 up as I think fit , for the dive .
Ps
I have dived with a guy that dos 1.9 ppo2 deco on OC ,
I have seen him do this and he was fine but I will stick with my 1,3 & 1.6 it works for me
I would be happly to breath 1.9 if i had to , put not for to long, me thinks
