DIR- Generic Why use GUE nitrox only

[lostsheep]

technically with nitrox 32 you can hit 125ft without any issue. Will I prob nope, maybe a lower % o2 will be a better mix IMO

How in the hell did you come up with 125’?

 

[justinthedeeps]

EAN32 could be used as a deco gas @ ppO₂ of 1.6atm as deep as ~40 metres or ~130 feet.

(1.6atm /0.32 - 1atm) * 10m/atm = 40m

Typically not recommended for general diving.

I actually just wrote a blog post about nitrox, not claiming it's completely accurate, but I hope someone will find it at least somewhat unique and entertaining

Using oxygen as an 'inert gas' (aka NITROX)

Enriched air (aka NITROX or EAN) is breathing gas in which the proportion of oxygen has been increased, and the proportion of nitrogen has been reduced. This is commonly breathed by SCUBA divers in order to reduce inert gas loading and the absorption of nitrogen into bodily tissues, resulting in...

justinthedeeps.com

 

[johnydive]

And when your tanks are full of air but you have the opportunity to join charter for 2x 90ft dives what to you do? Show up with the air when your buddies are on nitrox? Dump and refill?

at 1.6 not recommended tho see the math above

 

[SpeedyJ]

at 1.6 not recommended tho see the math above

How is your air going to become 1.6 of something at 90' and how does that impact the buddy team decompression plan and gas strategies? Please show math below...

 

[NW Dive Dawg]

The title of the thread is.....Why Use GUE Nitrox Only?

So is it OK for a GUE diver to use PADI or NAUI Nitrox?

 

[justinthedeeps]

The title of the thread is.....Why Use GUE Nitrox Only?

So is it OK for a GUE diver to use PADI or NAUI Nitrox?

Mate, where do we begin
Do they even have the proper GUE gas stickers???

 

[crofrog]

because it's team diving, and standardizing gases for depth ranges allow the team procedures to work.

Air is always the wrong mix. You're better off increasing your PPO2 to reduce inert gas loading, and then adding helium to reduce END and Gas Density.

 

[OMyMyOHellYes]

It's just Harry whining about how GUE touched his sensitive skin

Is that a "Bad touch"?

 

[PEDiver]

Do you know any GUE divers? Ever dived with one? It might open your mind, or not.

It's easier to just say "Kool-Aid" and dismiss the rationalization around why Nitrox > Air.

 

[scubadada]

Suppose you intend making a first dive (i.e., a non-repetitive dive). Then:

1. Assuming a normal, leisurely U/W finning RMV of 0.45 cu ft per min (say), how long will a full HP100 (102 cu ft @ 3,500 psig) last you at 50 fsw?

2. A 50 fsw dive using air has NDL = ??? min

3. A 50 fsw dive using EAN32 has NDL = ??? min. (Use END calculation.)

Someone already mentioned that the real benefit of using EAN32 (instead of air) for a 50 fsw dive is realized with the repetitive dive.

rx7diver

OK, I will play, better than scanning the posts in the PUB.

1. Your dive time will be about 79 min depending on what you use for your reserve pressure.

2 and 3. It depends on what decompression algorithm you use. Here is Buhlmann GF high 75-95 to give a spectrum

What exactly is the point here? The average diver may have an RMV above 0.45 cu ft/min and this example may not apply.

Average Gas Consumption

There has been extensive discussion lately regarding average gas consumption. A poll may help give us a better idea of what the normal distribution of RMVs is. 1 cu ft = 28.32 liters 1 liter = 0.035 cu ft 28.3 l/min

scubaboard.com

So, depending on your deco algorithm, your NDL on air may be less than your dive time. Of course, many divers rent AL80s rather than HP steel 100s.

I do a lot of diving in SE Florida, Boynton Beach, Jupiter, Palm Beach. All the operators have somewhat loose total dive times from the low 50s to 60 min. We do not adhere to GUE standards, 36% is commonly used on the shallower reefs less than 95 feet, NDL is generally not applicable. The concept of repetitive dives is a good one. Our SIs are generally around 45 min between dive 1&2, 3&4, usually about a 2 hour lunch break. Despite diving 36%, I am able to push the NDL on 4 dives per day and occasionally do light deco.