Nitrox for shallow water artifact diving??

[AfterDark]

At 33 feet a diver's body is offgassing, if they came up from deeper than 33 feet. It is ongassing if they just came down from 20 feet.

So what is it doing @ 25FSW on a 2hour dive? No much it would seem since I have never read of a case of DCS doing a 2hr @25FSW. Or any dive of any length of time at that depth. Have you?

 

[AfterDark]

Nitrox is used to lessen nitrogen uptake (compared to air) at ANY depth.

Your opinion. It may well do that. The history says it was developed to increase NDLs

 

[tursiops]

The history says it was developed to increase NDLs

And it does that by reducing nitrogen uptake, which works at any depth.

 

[ginti]

The fact is nitrox is used to extend NDLs.

Nitrox is used to lessen nitrogen uptake (compared to air) at ANY depth.

I am a bit confused... what's the purpose to lessen nitrogen uptake? As far as I understand, it is to extend NDL.

What else?

 

[AfterDark]

I am a bit confused... what's the purpose to lessen nitrogen uptake? As far as I understand, it is to extend NDL.

What else?

Right so on a 25FSW dive what NDL is being extended?

 

[AfterDark]

And it does that by reducing nitrogen uptake, which works at any depth.

Can you prove that?

 

[Divin'Papaw]

Like a few others on this thread I use nitrox on every dive. Several reasons why:

1. I fill my tanks after a day of diving and don't know exactly where/when I will be using those tanks next. I keep EAN36 in all of my tanks given that the majority of my divers are in the 50-95 foot range and 36 makes a huge difference at those depths.
2. I buy my nitrox fills in bulk in South FL (25-fill card) so the cost isn't bad.
3. I believe I feel better after diving with Nitrox, even shallow. I have no empirical evidence and it may be a placebo effect. But I do believe I am typically less fatigued.

I also believe that the Nitrox course is a great tool to have in your toolbelt even if you only occasionally use it. You will learn a great deal of useful information and will also be able to then utilize Nitrox when it brings value to your diving. Without the course it's a tool that is not available to you.

 

[ginti]

Right so on a 25FSW dive what NDL is being extended?

I am not arguing against your point.

As far as I understand, there is, in reality, absorption of nitrogen at those shallow depths, but it's minimal and negligible for practical applications. In other words, we shouldn't consider it, as you are doing.

@Duke Dive Medicine, could you clarify? (I hope it doesn't bother you the I am calling you so often in the last periods )

 

[tursiops]

Can you prove that?

Yes

 

[Divin'Papaw]

I am not arguing against your point.

As far as I understand, there is, in reality, absorption of nitrogen at those shallow depths, but it's minimal and negligible for practical applications. In other words, we shouldn't consider it, as you are doing.

@Duke Dive Medicine, could you clarify? (I hope it doesn't bother you the I am calling you so often in the last periods )

The way I look at it if cost isn't an issue, less nitrogen is always a good thing. Nitrogen is the bane of our existence as divers and that is why most of us replace a portion of it with oxygen (recreational dives) and/or helium (technical depths). Even if I'm well within my NDL on a shallow dive, less nitrogen is always better than more nitrogen if all other factors aren't an issue (cost and availability).