So what do you think ppo2 limits have changed since i started diving from 2.0 bar now up to 1.4 bar or less. Ought to they return to NOAA CNS exposure tables??
Printable View
So what do you think ppo2 limits have changed since i started diving from 2.0 bar now up to 1.4 bar or less. Ought to they return to NOAA CNS exposure tables??
It's all down to the odds. I read somewhere that with a PPO2 of 1.6, 97% of people show no side affects. Can't remember what it was for a PPO2 of 2.0 but the odds dropped to something like 80%.
I've read Oxygen and the Diver several times and have made my own conclusions as to the affects of higher PPO2's.
We learned that the high set point should be no more than 1.3 bars, an the low is .7
Over repetitive dives some guys have had vision issues at high setpoints.
I am always presuming we are talking CCR diving. 1.3 is the standard CCR high setpoint P02 but I am sure there are guys who deviate from that.
At a P02 of 1.6 one is going to be getting constant 02 injection from 20 feet and shallower so we always switch to the low setpoint above 40 or so feet.