Quote: (Originally Posted by
Dutchy)
Same thing could be accomplished by using EAN80@ 6m (EAN83 to be precise)
NO, in that case the pressure gradient would be reduced by the inert gas in the inspired gas at 6m. Therefore offgassing would be slower (assuming same inert gas).
Quote: (Originally Posted by
Janos)
Me. I go to 6m, "switch" to 100% O2, wait for a bit, then go as shallow as is practical.
Janos
Off gassing depends on the pressure gradient between pulmonary capillary blood and alveolar gas. Bubble formation will be governed by tissue over-saturation at ambient pressure. So as long as you are breathing 100% O2, then the deeper the better as far as bubble formation is concerned, off-gassing will be the same.
How deep you stop on 100% O2 will obviously be limited by how high/long you are prepared for your PO2 to be from a toxicity point of view.
I.e. Once you are on 100% O2 you are off-gassing maximally, if you can stay deeper (and are happy with O2 toxicity), then bubble formation will be less, Go shallower to reduce PO2, but you may increase bubble formation. However there may also be an issue with Varying ambient pressures as you go shallower in a swell.
Personally I think Janos has the right idea (as long as you can hold the depth).
Neil