At 133m with a ppo2 of 2.45-2.30 (and old sensors, look at those readings) you are not breathing air any more but nitrogen enriched air, due to him breathing down the mix it was closer to 16/84.
That's impressively dumb, like I don't want to talk bad about the dead but if he was a tec instructor he must have been denser than the gas he was breathing.
That's impressively dumb, like I don't want to talk bad about the dead but if he was a tec instructor he must have been denser than the gas he was breathing.