Quote: (Originally Posted by
Gilles)

Spyros;
I will contradict you here. Although I believe in having the shut-off valve, I would recommend to leave it open until having it open causes a problem.
I contradict all who subscribe to routinely shutting it once at bottom.
Why not leave it open and provide an easy and instant means to flush out your loop?(that's the way it works on the Meg anyway).
JohnyB would argue that he wouldn't want to be spending time analyzing the setup to ensure he's pressing the right buttons. He seemed so committed to the "right is rich" principal, that the discussion influenced me to installing a yellow man-ad hose (to my left CL).
Absolutely not. The only way a nonRB diver could assist is if I instructed and practised the turning on of my BOV (which I normally do).
hey Gilles,
always nice to discuss these sort of things. dont' know hijacking thethread but, sometimes, just by moving your left arm, the ADV starts pumping dil inside, and it ruins the mix. personally, i have found it to work fine for me. it became an instict move now, and i can handle open/closing the shut off valve with one hand. this way it doesn't affect my mix unless i want to.
also, keeping the minima amount of gas inthe lungs is another thing. it seems that i have big lungs, and each time i take a breath, the ADV used to screw up everything

.
it was just a sugestion. regarding your thoughts about the discussion with Jonny, i would suggest you put a green hose instead of the yellow on the O2. i guess more or less divers can recognize that colour to be associated with o2 or richer mix...
just another thought. (i mean you made the move to change colour, why not green?) no offence Gilles, not trying to point out things here. i highly respect your opinion.
also, just thinking that if i ever found an uncosious diver onthe bottom, i would be reluctant to give him the mix he is having as i wont know what mix it is... i mean if he/she is uncoscious, then you wonder how long have they been like that? is it worth trying to stick air though their mouth? but if they are breathing, i would give them my bail out mix, as i will be sure that that is a safe gas to let him/her breath.
a few thoughts ...
Thanks.