Dive planning and OTU's

[diveongas]

Was a time that O2 at 30' was acceptable.

Might be worth some research.

[Nitrogenius]

Guys as Long as you stay Close to CNS Limits and not or only slightly exceed 100% CNS there is no Chance whatsoever to get close to any OTU issues no matter how long and often you dive..
BTW on a rebreather I use a PO2 of 1.0 for the working Phase of the Project but not for reasons of OTU or CNS even if it helps though. I do it because it is simply the closest to claibration Point and it does not Change deco Obligation significantly as Long as you ramp it up during deco..