Who's using 100% O2 for deco?

[lowviz]

There is controversy over using 80% as a deco gas?

Oh God. Let's get it over with. DIR (actually Irvine) calls it "stroke gas". I'm fine with that. Their bottom line is that if you can't hold your deco stop then you shouldn't be in the water. I've been in 6' seas. -I shouldn't be in the water.

 

[Jax]

Interesting.

I like 80%. I go on my deco earlier, for more of my deco time. Since I am prone to sub-clinical DCS symptoms, I like going on a richer gas earlier.


As for DIR (Irvine), I'm not finding I agree completely with the way they do some things.

 

[ianr33]

Interesting.

I like 80%. I go on my deco earlier, for more of my deco time. Since I am prone to sub-clinical DCS symptoms, I like going on a richer gas earlier.


As for DIR (Irvine), I'm not finding I agree completely with the way they do some things.

Stroke!

The Bakers Dozen - 13 reasons why we do not use 80/20 by George Irvine

And to answer the OP: Everybody uses O2.

 

[lowviz]

Stroke!

The Bakers Dozen - 13 reasons why we do not use 80/20 by George Irvine

And to answer the OP: Everybody uses O2.

 

[MXGratefulDiver]

Everybody uses O2.

Actually, there are places where it's simply not available ... at least, not at the 100% level. So in those places, you either use what's available, or you don't dive.

If those are my choices, I'm gonna use what's available ...

... Bob (Grateful Diver)

 

[lowviz]

....//....As for DIR (Irvine), I'm not finding I agree completely with the way they do some things.

I really like most of what they do, but I have a few issues too. So let's just not tell anybody and get on with life and diving.

 

[Centrals]

In many places 200 bar of 100% O2 simply is NOT possible because of lack of a booster pump. You have to decide if you want 120 bars of O2 or 200 bar of 75/80%.
Stroke!! I don't give a toss.

 

[Jax]

Stroke!

The Bakers Dozen - 13 reasons why we do not use 80/20 by George Irvine

And to answer the OP: Everybody uses O2.

Failure to constrict the topic in that . . . Lots of assumptions and begging the question.

Any reasoned evidence why it's a bad thing?

 

[Atticus]

In my NAUI, TDI, IANTD, and UTD classes we used 100% and I can't recall the last time I did a dive with someone who doesn't use 100%.

The only argument that makes even a little sense is if you have 2400 psi supply bottles, 3000 psi deco bottles, and no booster. 2000 psi of oxygen in alu 40 supports a pretty long deco hang - it's not much of an issue. If you really need more use an alu 80 or go to a shop with a booster.

 

[Jax]

In my NAUI, TDI, IANTD, and UTD classes we used 100% and I can't recall the last time I did a dive with someone who doesn't use 100%.

The only argument that makes even a little sense is if you have 2400 psi supply bottles, 3000 psi deco bottles, and no booster. 2000 psi of oxygen in alu 40 supports a pretty long deco hang - it's not much of an issue. If you really need more use an alu 80 or go to a shop with a booster.

So, you're saying the reason to use 100% is because everyone else is . . . ?