Any reported cases of Ox Tox between 1.4 and 1.6?

[rjack321]

Nice analysis, but I know all that. I think we agree, but apparently you'd rather argue.

On the internet? Nevah!

 

[scubadada]

They don't; they dive it to accumulate less N2.
Do the same (allowable) dive on air and Nitrox; on Nitrox you on-gas less N2. My point is that you often can't dive to the increased NDL of Nitrox because you haven't got enough gas to do that.

I generally dive nitrox for the longer dive times, especially on the 2nd, 3rd, and 4th dive per day. I have very good gas consumption.

 

[boulderjohn]

My point is that you often can't dive to the increased NDL of Nitrox because you haven't got enough gas to do that.

You are sounding like Alex Brylske here. When he was the editor of Dive Training, he wrote several articles in which he said fiving nitrox gave you two options: 1) dive to air limits and get increased safety from less N2, or 2) dive to the limits of the nitrox table and get more bottom time but no benefit from less N2.

According to the PADI air tables, if I go to 80 feet, I get a maximum bottom time of 30 minutes. If I dive with EANx 36, I get a bottom time of 55 minutes.

Let's say I dive for 45 minutes. As I do the math, that means I got 15 minutes more bottom time. Are you joining Alex and saying that I only get increased bottom time if I go for the full 55 minutes? Are you saying that 45 is not greater than 30?

 

[boulderjohn]

It's not the odd's but the stakes... oxtox events kill people all the time in scuba. Certainty in the top 5 for technical divers.

I can give the details of a number of oxtox cases. Every one of them was on a technical dive with the diver 1) going far beyond the 1.4 limit 2) for an extended period of time. I do not know of a single confirmed case with a recreational diver diving with normal recreational nitrox blends.

 

[tursiops]

You are sounding like Alex Brylske here. When he was the editor of Dive Training, he wrote several articles in which he said fiving nitrox gave you two options: 1) dive to air limits and get increased safety from less N2, or 2) dive to the limits of the nitrox table and get more bottom time but no benefit from less N2.

According to the PADI air tables, if I go to 80 feet, I get a maximum bottom time of 30 minutes. If I dive with EANx 36, I get a bottom time of 55 minutes.

Let's say I dive for 45 minutes. As I do the math, that means I got 15 minutes more bottom time. Are you joining Alex and saying that I only get increased bottom time if I go for the full 55 minutes? Are you saying that 45 is not greater than 30?

I'm saying the diving is rarely modified simply because Nitrox is being used. Rather, the principal limiting factor on the dive is not NDL but rather one's gas supply, or the time-limits of the diver operator. You may get a few extra minutes, with less concern for overstaying your NDL, but mostly you get less N2. PADI refuses to say this is "safer," because they contend it it already safe, so how can you be safer than safe? That is semantic nonsense; if you are ongassing less N2, you are farther from DCS. Do you disagree?

 

[tursiops]

According to the PADI air tables, if I go to 80 feet, I get a maximum bottom time of 30 minutes. If I dive with EANx 36, I get a bottom time of 55 minutes.

Let's say I dive for 45 minutes. As I do the math, that means I got 15 minutes more bottom time.

The problem with this example is that you are most likely going o run out of gas before you get to 55 minutes, or even 45 minutes, if you dive a square profile and use an AL80.

 

[scubadada]

The problem with this example is that you are most likely going o run out of gas before you get to 55 minutes, or even 45 minutes, if you dive a square profile and use an AL80.

I get 53 min with my average RMV of 0.36 cu ft/min.

 

[tursiops]

I get 53 min with my average RMV of 0.36 cu ft/min.

So? You already know you are not normal.

 

[scubadada]

So? You already know you are not normal.

And one of the reasons I dive nitrox. I don't mind surfacing with a lower GF

 

[flymolo]

The problem with this example is that you are most likely going o run out of gas before you get to 55 minutes, or even 45 minutes, if you dive a square profile and use an AL80.

How bout if you use a steel 100 or even a 120? Or does no one do that either