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Why not at least try lower percentage blends to see where her trigger point is? Once you find it, give her a banana and call it a day.

Ok, well then I suppose we can agree that for those recreational divers who want to experience subtle, measurable (in studies only) positive physiological effects of trimix that remain unquantified when diving over 100' they're welcome to pay the additional cost of tri-mix if they can even find it.

I meant that the advantage of trimix over nitrox for recreational divers cannot be verified if there are no verifiable aka measurable outcomes that demonstrate what those studies are suggesting. It's all theoretical, or at least, the effects of those gases on divers both positive and negative...

@bardass I can't find a single reference to a person experiencing symptoms such as the ones you describe with this lady, anywhere. Some sort of odd placebo effect simply cannot be ruled out. I suggest you do the following: 1- double blind study where the lady in question alternately dives...

Only if there are verifiable and permanent consequences.

Ok well that's rather odd and it's the first time I've ever heard about such a thing, however I'm willing to accept it may have some merit. It's certainly more believable than the debunked notion that nitrox makes divers feel better (possibly true only in cases where a diver on air is...

Ok, so lets assume all of that stuff and the references you posted are all valid and there is some slight advantage/safety margin to breathing trimix at depths greater than 100 up to the 130' limit (for recreational divers so certified). It's not practical or economically feasible to pay for...

Are you saying I shouldn't go on that submersible trip I've got booked through Groupon?

I hate to break it to you, but he's imploded.

Because I went through the trouble of reading all this and trying to decipher your twisted and convoluted mathematical equations I now have a frontal lobe headache. In retribution, on my next dive trip I will not tip the crew anything.

Nitrox provides a tangible benefit. As does any well trained and responsible diver, I don't rely on a DM for my safety. In fact often times I consider them to be an annoying distraction that I don't want and didn't ask for.

Overly active imagination, vulnerability and naivity possibly combined with a strong belief in conspiracy theories. Another possibility is that this particular lady doesn't fully understand the complexities and proper usage of nitrox and experiences a moderate degree anxiety when she knows...

HA HA HA HA HA that's a good one. :cool::D:giggle:

@Nemrod: Thank you for attempting to provide reasons that DIN is superior to yoke, and giving me the opportunity to scrutinize and debunk them. Ah the old "you're going to snag (a suicide clip/retractor/yoke valve/split fin, etc) on a fishing line in a wreck and die!". I read about that...

The post you are replying to wasn't about diving nitrox vs air.

It's easy there's a lot less of them now. Along with coral and fish. Many would disagree that drift diving, which involves complexities such as jumping off a live boat precisely when directed, and immediately initiating a negative decent in strong currents in depths to 100', in visibility such...

You're suggesting that millions of recreational divers are doing themselves some sort of grave disservice because they don't use trimix when diving within recreational limits?

You started out just fine, with an understanding and valid explanation of the Placebo effect, and then, as if you were a totally different person you completely contradict yourself.

So an old cheap person learns a much needed and valuable lesson by diving air and getting bent?

It's interesting how different people believe things that have no merit or basis in fact.