| The BSAC SDP of 1.4 PO2 max is controversial and has lost them some members...
For myself, I tend to switch to 50 at 21m and sit there a couple of minues to clear some helium and make a bubble stop. Under BSAC this would be at 18m. To be honest I have not done enough of this sort of diving to say if there is likley to be a difference. My (IANTD) training argues that the switch is better made sooner, but no-one was really making a big deal of it.
The branch we used to dive with rarely made deep dives so it would not have been an issue. Our DO never mentioned PO2s and was not Nitrox qualified - I doubt the subject would have arrisen.
If your DO says no and you ignore them s/he could, in theory, kick you out or at least refuse to let you dive. So the real question is not PO2 (you know the answer to that one) but whether you care about staying in your branch and whether you have the decency to respect your DO's position even if their position is "wrong".
That, I can't answer for you!!
Chris  |