Quote:
| Originally Posted by Mal Bridgeman
OK so what I am understanding is that with an ADV the descent load on the diver is not a great deal different to an OC diver .... just clear your ears and inflate your wing to compensate for the buoyancy shift.
On the ppO2 front, if you have a ppO2 of 1.3 at 10m how do you get it down by the time you get the wreck? .... Does the automatic addition of diluent keep it down?
Once I have understood this, I am likely to ask questions about what happens on the ascent.
Before I do though, why a pp02 of 1.3? What is the wisdom behind that?
Cheers
Mal
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Personally I use 1.3 because it's 3 hours before you hit CNS. It's also conveniently not far off what you get if you run bottom gas at 1.4 and deco gas at 1.6 on OC. So you're not in the water massively longer or shorter than guys carrying a sensible number of gases.
It's also what a lot of ECCRs run on, for whatever reason, and so you might as well stick with them
Basically it's as high as the ppO2 can be without being a tox issue. If you ran your unit at 1.4 then you'd run out of O2 clock before you ran out of scrubber life (in theory) and if you ran it at much less you'd have the opposite problem.
You should really dive a few of them, in the interests of balance of course.
Digs.