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It comes back to technique and NOT equipment or configuration.
I would at worst have half a tank available to me, that's how I
manage my air. I never breathe independants down below 50%
unless I am already on my deco station. That leaves plenty of
air to save my ass and a bit for emergencies as well.

Generally I would start my dive on one bottle, when I reach 2/3
of that first tank I switch to the second. I breathe that tank
no further than 50% before I am on my way back to the surface.
That means at the anchor line and ascending. I have learned my
lesson from poor technique on independants and have found that
this system works well for the diving I do. I enjoy diving with
a manifold since I don't have to watch my gas so closely. But
that is also a benefit of independants, I feel, that you are
constantly aware of your gas supply. Not a difficult task once
you are used to it.

I have heard no one fault independants, only their poor use.

Mark


Jon Breazile wrote:
> 
> Hey Mark, I thought you were a thinking diver. Are you saying that
> you would switch to your empty tank and exit?
> 
> Mark Welzel wrote:
> >Here's one Jimmy Boy; you're in a wreck, the guy in the next room
> > is using a pnuematic chisel while his partner is hammering away
> > on a porthole. When you slipped into the room you are in your
> > second regs second stage got loose and jammed in the doorway. Since
> > you only went in 2 or 3 feet you didn't feel it tug, but there
> > it is dumping all your manifolded gas, and you can't hear it
> > because of the noise and the fact that it's on the otherside of
> > a wall. Worse yet you see some coins in the muck, dig, drop your light
> > and can't find that because you ruined the vis while digging. You
> > trace your lights lead and find it just as you suck vacuum.
> > You say "but this can't happen to me, techdiver said so!"
> > Them you die.
> >
> > On independants you would just switch to your other tank
> > and leave.
> 
> -Jon
> --
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