Mark,
Tks for the reply.
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| Originally Posted by [b Quote[/b] ]First the dive plan and the dive are not the same thing....My VR3 constantly monitors PP02 at all variable presures throughought the dive rather than just taking the planned deepest profile and doing it on that. Thats where I got the comparison. |
My dive computer also works on the same principal and I knew before the dive I would probably get to this position. From previous dives working on ppO2 of 1.6 I knew I would be "no worse off" that previous dive profiles - just that the computer wouldn't like it being set to 1.4
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| Originally Posted by [b Quote[/b] ]Most CNS incidents are wrong as switch events where people switch to 80 -100 % at 30m rather than to travel gas. Unless you are into big profiles with high 02 off gassing it is not going to be an issue. I supose a 40% dive on nitrox to 30M fro 1.0 will show up a few problems but there are not many people planning that sort of profile. |
I only dive with two mixes and provided I start on the right mix I am not going to suffer this problem (one for the future though).
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| Originally Posted by [b Quote[/b] ]How common is a CNS hit?? |
In a round about way that was what I was trying to find out.
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| Originally Posted by [b Quote[/b] ]Freind of a one of my Dive contacts was the chap who toxed sank and died earlier this year. |
Sorry to hear it.
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| Originally Posted by [b Quote[/b] ]Thats two in the last twelve months so it dose happen. There are no set figures for who will and who wont surfice as to say that wen reaching limits of 100% CNS you should not be exerting your self in any way and should have some contingancy. IE a necklesed rig that straps the reg into your mouth, a full face mask, Clipping your self to a lift bag or suitable SMB and SUPPORT DIVERS |
I dive with a FFM anyway.
I guess the question I wanted to ask, and to which there is probably no answer, is that based on current information is there a minimum threshold that we could ALL say we are safe (probably) up to this point BUT after that you are in the convulsion zone.
Rgds
Bryan