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> I am prompted by the current discussion about course proliferation to 
> ask what use is nitrox other than as a decompression gas?
> 
> ... If this is so, 
> is the minor reduction in tissue inert gas loading by using nitrox in this 
> way worth the risk of inadvertantly diving on a potentially oxygen toxic 
> mixture, by for instance, accidentally using the wrong cylinder (even 
> though they are meant to be colour coded and labelled).

In my diving community there has been quite an interest in using nitrox
amongst both the older and over-weight divers. 

We don't seem to have a problem with getting wrong cylinders because most
people maintain their own - no mass hiring or cattle market approach. Most
people here are very particular about diving with their own kit.

The closest I've ever come to using the wrong cylinder was when I picked
up my buddy's cylinder after the dive and drove home with it. I got a phone
call the next day suggesting that since I had the cylinder I'd better make
sure it was full the next time we went diving.

Alan

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