Argox

[Vtach]

You didn't mention what the gas fractions were or MOD.
Was it a stage or a deco bottle?  I'm going to assume it was a deco bottle.

I have not seen it used but understand the idea behind it.  Based on simple molecular weight and lipid solubility it doesn't seem to offer a significant advantage over using Nitrogen as a decompression gas.  Being dense, it may help to eliminate less dense inert gases because it ongasses at a slower rate.  Density can also be a drawback also in regards to regulator mechanics and human anatomy and the ability to exchange gas in high demand situations.   I think the drawbacks and lack of study documentation on the decompression use of Argon still far outweigh the potential benefits.  I guess there is a study done by Bennett and Elliott that illustrates "wrong-way" counterdiffusion has dramatic negative results in lab animals (He on top of Ar).  I have not read it but if anyone has a link please post it.

I would like to see what decompression model this individual is using and the logic pertaining to counterdiffusion, density, narcotic potential, etc.. that is significant enough to warrant using Argox.

So...waiting to hear the rest of the story..