Quote: (Originally Posted by
EBT)
Thats not what I asked though is it dave. The point I was making is that your technique is REQUIRED because you dive alpinist. Someone with OC bailout may choose different techniques since they have an additional tool in the armoury. You have to look at the circumstances to be sure you're being appropriate and avoiding IACDT (as you put it).
Personally, my dil at its richest runs to 1.3 PO2, normally its 1.0. My reasons;
1. it provides an effective flush DOWN
2. despite USN limits etc, the world has based their O2 limits on kenneth mcdonalds work and his conlusions were essentially that O2 is unpredictable even within the same individual. I dont want to push that.
3. In an emergency, theres a good chance of elevated adrenaline and a possibility of elevated CO2. Both of those are bad ideas with high O2.
one thing we do agree on... hypoxia is serious and immediate, hyperoxia is not quite as serious and definitely not as immediate.
I do welcome the alternate views though, it never hurts to understand and consider other approaches.
/Z
I couldn't agree more Zak. Whilst understanding Dave's point I couldn't disagree with his beliefs on this issue more strenuously if I tried. I just can't get the cold hard fact that every rebreather diver that I knew personally that is no longer with us died from either one or a combination of 4 things;
- Inadequate bailout volume. They needed more gas.
- Hyperoxia and then drowning
- No buddy to help out and fix a small issue that snowballed
- Skill deficit. They made a simple mistake and they should have known better
I feel compelled to learn from their deaths.
This topic should get it's own thread IMO