Nitrox computer diving air profiles

[Kharon]

If diving air after Nitrox we were told that rather than setting the computer to air to set it to 21% Nitrox instead (≡ air) and computer will monitor PO2 & simply observe MOD for your Nitrox mix. I'd do the same diving an air profile on Nitrox.

 

[Superlyte27]

Hi Superlyte27,

No reason to be insulting. I was just pointing out it's not impossible, or even that difficult, to hit the NOAA O2 limit.

In Boynton Beach, my average depths are about 53-55 feet and my bottom times are about 75 minutes. No I don't generally go into deco. I often do 4 dives per day and othen dive multiple days. My surface intervals are generally around an hour, the O2 clock is per day. My average depths on the Castor are around 80 feet with run times around 50 minutes, usually close or just into deco. I don't lay around in the sand

Best, Craig

Craig:

I wasn't being insulting. I promise. Me being insulting is unmistakable. I don't think you're a moron. But I did think you didn't understand all the calculations that went into your dive. I knew that you didn't lay on the bottom, and I knew that you didn't really stay at max depth the entire dives. I'm just pretty blunt in pointing that out and it makes me look like an a-hole. Mostly because I'm an a-hole. I guess I could have been nicer saying that those little changes like 52' instead of 60' and your ascent times and everything else that plays into it really does keep you from reaching your maximum OTU's. But that's for another class.

Anyway, good on you for getting to dive so much. I think PADI published that 90% of divers quit diving after the first 2 years. It sounds like you are in it for the long haul.

 

[scubadada]

Craig:

I wasn't being insulting. I promise. Me being insulting is unmistakable. I don't think you're a moron. But I did think you didn't understand all the calculations that went into your dive. I knew that you didn't lay on the bottom, and I knew that you didn't really stay at max depth the entire dives. I'm just pretty blunt in pointing that out and it makes me look like an a-hole. Mostly because I'm an a-hole. I guess I could have been nicer saying that those little changes like 52' instead of 60' and your ascent times and everything else that plays into it really does keep you from reaching your maximum OTU's. But that's for another class.

Anyway, good on you for getting to dive so much. I think PADI published that 90% of divers quit diving after the first 2 years. It sounds like you are in it for the long haul.

Superlyte27, appreciate the message. Maybe we'll run into each other someday.

Good diving, Craig

 

[Tigerman]

If diving air after Nitrox we were told that rather than setting the computer to air to set it to 21% Nitrox instead (≡ air) and computer will monitor PO2 & simply observe MOD for your Nitrox mix. I'd do the same diving an air profile on Nitrox.

Mmm.. does most computers (not he mix) even display anything different from air to nitrox? The ones Ive seen is not really swiched from one to the other, you just set the o2 level and thats it..

 

[boulderjohn]

I meant by dialing in the actual FO2 i'm using, (say 32%) into the computer.
With air profile, I mean entering 21% as my FO2, even though i would really be breathing a higher mix.

What is the purpose of doing this?

I know the answer, but think it through. You are diving nitrox on an air profile to decrease the risk of DCS. So what is the risk of DCS on recreational dives when diving with air? I don't recall exactly, but it is something like 0.01%. By diving nitrox on an air profile, you might be improving that possiblity to, what, 0.007%? Congratulations! You have just spent a bunch of extra money to make a statistically insignificant improvement in the odds that you will prevent something that is already overwhelmingly unlikely.

Why not dive nitrox instead for its intended purposes of increasing bottom time and lessening surface intervals?

What I just wrote is usually included in nitrox instruction.

 

[Tigerman]

...
Why not dive nitrox instead for its intended purposes of increasing bottom time and lessening surface intervals?

What I just wrote is usually included in nitrox instruction.

* Because youll be less tired
* Because its good for your boner
(Well, so people claim anyways)

 

[Tortuga68]

Nobody likes a bent weiner

 

[boulderjohn]

* Because its good for your boner

Now maybe all the Chinese divers will be using nitrox on air profiles instead of using endangered and illegal rhinoceros horn powder as an aphrodisiac.

 

[Tigerman]

Now maybe all the Chinese divers will be using nitrox on air profiles instead of using endangered and illegal rhinoceros horn powder as an aphrodisiac.

Now wouldnt that be a good start

 

[beaverdivers]

If diving air after Nitrox we were told that rather than setting the computer to air to set it to 21% Nitrox instead (≡ air) and computer will monitor PO2 & simply observe MOD for your Nitrox mix. I'd do the same diving an air profile on Nitrox.

I am not sure which dive computer that you are using, but the Uwatec Aladin 2G, the OP is using ( along w/ all the other Uwatec dive computers sold under the Scubapro/SubGear name ), requires that you set a Nitrox mix from 21% - 100%. !00% is O2; a 21% Nitrox mix is referred to as air.