Abbo

Yes, I've breathed 16/35 at the surface in a current and it was an unpleasant experience till I reached 10 metres. People actually climb Everest, albeit pretty slowly for the last few hundred metres, at 0.05B. That's a long way below the 0.12 I was told will result in death for a diver.

I'm intrigued about the oxygen clock: clearly for deep dives you can't help going to several hundred percent on the clock. It doesn't seem to have quite the relavence it had in training.