Fatty tanks of Nitrox!

[cvchief]

It sounds good, but DAN has pretty well destroyed the myth. Nitrox one benefit is longer NDLs.

So you are saying the degree of nitrogen loading doesn't change the safety margin? DAN says if you dive Nitrox on air table it is a little safer. (And I did say the SAME profile) Of course it doesn't if you go to the NDL on Nitrox and that would the SAME nitrogen loading.

I don't know about Mares. Some computers claim to be safer by penalizing the diver with shorter dive times, but it's fake science - marketing.

So you are saying a computer that brings you up with LESS nitrogen loading isn't safer? So nitrogen load doesn't really make a difference? That seem different from what I had learned. Why do people say long SI to lower the nitrogen loading is a good thing, if it doesn't matter?

 

[DandyDon]

So you are saying the degree of nitrogen loading doesn't change the safety margin? DAN says if you dive Nitrox on air table it is a little safer. (And I did say the SAME profile) Of course it doesn't if you go to the NDL on Nitrox and that would the SAME nitrogen loading.



So you are saying a computer that brings you up with LESS nitrogen loading isn't safer? So nitrogen load doesn't really make a difference? That seem different from what I had learned. Why do people say long SI to lower the nitrogen loading is a good thing, if it doesn't matter?

It's true that you are less likely to take a hit if you never go in the water, but hits are so rare that such logic is immaterial. Diving a computer that is as liberal as Padi tables gives you more NDL than some other computers with "safer" marketing gimmicks, but there is just not enough difference to measure. The best ways to reduce risks of hits is with deep stops, safety stops, slow ascents - especially after the last 15 feet, avoiding strenuous actions leaving the water and for an hour or two after, and such.

Try diving NC wrecks. Everyone hangs on the hang line and discusses deco time in hand signals. I've had to bum air off others to complete deco there after equipment problems along with my poor handling.

 

[DandyDon]

To believe that using nitrox to dive longer and still leave more cushion between dive time and NDL's is not safer than diving air to the NDL's air is to say that using every minute of NDL time is as safe as leaving a cushion and I never hear anybody saying dive your computers to the limit.

I never am bothered by exceeding my NDL as long as I have enough gas to work my way out safely. I do carry an extra 19 cf for emergencies tho.

 

[KenGordon]

It's true that you are less likely to take a hit if you never go in the water, but hits are so rare that such logic is immaterial.

Tell that to the 70 odd people recorded as bent here http://www.bsac.com/core/core_picker/download.asp?id=27676&filetitle=Diving+Incident+Report+2016

35% of those were within limits. That 70 is certainly not all the UK bends either.

 

[Edward3c]

The best ways to reduce risks of hits is with deep stops, safety stops, slow ascents - especially after the last 15 feet, avoiding strenuous actions leaving the water and for an hour or two after, and such.

You need to watch the u-tube talk by Simon Mitchell "Decompression Controversies". Then concider whether deep stops are save.

 

[cvchief]

I'll take that as yes, you came around to acknowledging I was correct.

I hear lots of anecdotal evidence of undeserved hits taking chamber rides. Nitrox is a little bit of safety that doesn't cost much. And now in 100CF fatties!!

 

[Dave Dillehay]

I'll take that as yes, you came around to acknowledging I was correct.

I hear lots of anecdotal evidence of undeserved hits taking chamber rides. Nitrox is a little bit of safety that doesn't cost much. And now in 100CF fatties!!

You do mean 91 cf fatties don't you chief?

 

[cvchief]

You do mean 91 cf fatties don't you chief?

Right! 1cf bigger than your girly tanks!!

And we don't know, maybe Merry-D has read the fill pressure on them.....

 

[DandyDon]

Tell that to the 70 odd people recorded as bent here http://www.bsac.com/core/core_picker/download.asp?id=27676&filetitle=Diving+Incident+Report+2016

35% of those were within limits. That 70 is certainly not all the UK bends either.

You want me to read a 49 page report? Yeah, I'll get on that.

Hits do happen, and causes are debatable, but fortunately they are very rare. We have a Deco forum where they discuss theory.

You need to watch the u-tube talk by Simon Mitchell "Decompression Controversies". Then concider whether deep stops are save.

And you want me to browse youtube. Does he know more than DAN? Yeah, I'll get on that.

I hear lots of anecdotal evidence of undeserved hits taking chamber rides. Nitrox is a little bit of safety that doesn't cost much. And now in 100CF fatties!!

And if you show up at a Coz chamber with a DAN card and a hangover, you'll be issued cotton PJs for your ride, too. Keeping Mexicans employed and clinics paid is a high priority. Nitrox is great for extending NDLs. Extra safety is a matter of opinion. As far as costs, Coz nitrox charges are really high.

 

[cvchief]

Nitrox is great for extending NDLs. Extra safety is a matter of opinion.

You mean you vs DAN?