buggeriamold
New
Hi there
I have back read through most of the posts and it seem that you folks dont go to hard on silly questions.
Having been certified in 1984, I thought it was about time to catch up with the times and do a nitrox course, which brought to me the concept of EAD. My understanding of the EAD calculation that PADI teaches says that its the partial pressure N2 that is important in working out the no deco limits, not the actual depth (pressure) that you are subjected to. This to me seem that there is a whole heap of fudging going on.
To illustrate my point lets look at the recommended safety stop depth of 5 meters.
Air ppn2 at 5 meters = 1.185
40/60 nitrox ppn2 at 5 meters = .9
there for if the only thing that influences nitrogen absorbs ion is ppn2 we should either be doing, if we believe that old air 5 meter stop, a stop on nitrox 40/60 at 9.75 meters or do an air stop at 1.39 meters to use the 40/60 ppn2.
So I gues what I am asking is, is there a theretical reason that only the ppn2 influences the uptake and offgassing of nitrogen
Thanks Mark
I have back read through most of the posts and it seem that you folks dont go to hard on silly questions.
Having been certified in 1984, I thought it was about time to catch up with the times and do a nitrox course, which brought to me the concept of EAD. My understanding of the EAD calculation that PADI teaches says that its the partial pressure N2 that is important in working out the no deco limits, not the actual depth (pressure) that you are subjected to. This to me seem that there is a whole heap of fudging going on.
To illustrate my point lets look at the recommended safety stop depth of 5 meters.
Air ppn2 at 5 meters = 1.185
40/60 nitrox ppn2 at 5 meters = .9
there for if the only thing that influences nitrogen absorbs ion is ppn2 we should either be doing, if we believe that old air 5 meter stop, a stop on nitrox 40/60 at 9.75 meters or do an air stop at 1.39 meters to use the 40/60 ppn2.
So I gues what I am asking is, is there a theretical reason that only the ppn2 influences the uptake and offgassing of nitrogen
Thanks Mark