Nitrox vs Air

[bwade]

Jax is purrty .... now.. :focus:

 

[DandyDon]

I think the first input is actually a question - WHY are you getting your nitrox cert?

The question you ask tells me you don't know why, therrefore I have to wonder why you are wanting it?


Ken

He posted to that.

He's in Virginia. Great wreck diving just down the coast: deeper, square bottom dives.

And it's a good tool for any diver. Sometimes the whole boat has to alter plans to compensate for those without Nitrox cards.

 

[Jax]

He posted to that.

He's in Virginia. Great wreck diving just down the coast: deeper, square bottom dives.

And it's a good tool for any diver. Sometimes the whole boat has to alter plans to compensate for those without Nitrox cards.

:w-t-f: Good Lord, why would that be?

Just tell the air guys to enjoy their short dive and enjoy their wait for the others! You have some weird ops in your neck of the woods.

 

[String]

Why would anyone except the guys buddy alter its plan for an air diver? Makes no sense.

Lol, that's not how science works!

Actually that's exactly how scientific method works. You put forward a theory (ie nitrox reduces fatigue) then supply evidence to back that up. The evidence is hen scrutinised. Unless that happens the status quo (no effect) remains.

So off you go for a double-blind trial along with developing quantitative and reliable methods for measuring fatigue, developing controls and so on.

 

[DandyDon]

:w-t-f: Good Lord, why would that be?

Just tell the air guys to enjoy their short dive and enjoy their wait for the others! You have some weird ops in your neck of the woods.

Uh, I was not in charge....

Why would anyone except the guys buddy alter its plan for an air diver? Makes no sense.

Yeah, it's lame, but happens.

 

[mbram]

Why would anyone except the guys buddy alter its plan for an air diver? Makes no sense.



Actually that's exactly how scientific method works. You put forward a theory (ie nitrox reduces fatigue) then supply evidence to back that up. The evidence is hen scrutinised. Unless that happens the status quo (no effect) remains.

So off you go for a double-blind trial along with developing quantitative and reliable methods for measuring fatigue, developing controls and so on.

And where is the study that backs up your claim that it's a placebo effect? Surely with all your knowledge of the scientific method you realize that your statement was invalid and idiotic.

 

[MaxBottomtime]

And where is the study that backs up your claim that it's a placebo effect? Surely with all your knowledge of the scientific method you realize that your statement was invalid and idiotic.

Actually, it is a true statement. If you said you were abducted by aliens and I said it wasn't true, I would not have to prove you weren't abducted. Most reasonable people would not believe you. You can believe anything you want about nitrox, but unless you have some solid evidence that it reduces fatigue or lowers DCS risk significantly, I'll continue to believe known facts.

 

[String]

And where is the study that backs up your claim that it's a placebo effect? Surely with all your knowledge of the scientific method you realize that your statement was invalid and idiotic.

The status quo remains until proven otherwise. Its how standard scientific method and peer review works.

Otherwise i could quite happily state "I have pink fairies living at the bottom of my garden that only i can see and talk to" and pass it off as true unless you can prove otherwise.

FWIW there have been some small scale studies and all have failed to find any reduction in fatigue (however you attempt to quantify that) over a placebo. But that isn't relevant to the above. Its a very difficult thing to test and measure but there is currently no evidence supporting a reduction in fatigue nor in fact is there any postulated mechanism as to why it would that stands up to any scrutiny. However placebo effect is known to and scientifically proven to have a physical effect on a person.

 

[mikeb663]

Well you have a shallower maximum depth. Your NDL for a certain depth range is increased vs air. It often costs 2-3x that of an air fill.

If you're ending dives because you're running up to a NDL as opposed to a time or air limit then nitrox is useful. If you're not ending dives due to NDL limits it won't be.
For open water level dives that are 18m max its almost certainly air consumption not NDL limiting the dives.



and your referenced source to back this claim up is where exactly?

Do you really need a reference source for people using nitrox to increase their safety margin? If you make a dive on air, you would have an increased margin of safety if the same dive were made on an appropriate mix of nitrox for the same amount of time as you would have on-gassed less nitrogen. What sort of reference were you looking for?

 

[Jax]

Otherwise i could quite happily state "I have pink fairies living at the bottom of my garden that only i can see and talk to" and pass it off as true unless you can prove otherwise.

Ooh, ooh! Will you introduce me?







:joke: