Re: [PSUBS-MAILIST] question about Diver Lockout.

["Michael Wludarczyk" <divedawn13@hotmail.com>]

Hallo Carsten,
we used to calculate the 20% of oxigen from the ambient volume of air in the 
chamber to the heliox
and pressurized with heliox, the mix of air and heliox. When you see the mix 
at 12 to 18 bars, then the air is just a fraction and not an partial 
pressure to worry about, we also did saturation dives, with circulating 
gases through filters and dryers.The pp nitrogen is to small to be affected 
to nitrogen narcoses, the main point is to keep the ppo2 under .42 at depth.
Good books on sat diving, "Medicine of diving" by Buhlmann and Schenk.


>From: MerlinSub@t-online.de (Carsten Standfuss)
>Reply-To: personal_submersibles@psubs.org
>To: personal_submersibles@psubs.org
>Subject: Re: [PSUBS-MAILIST] question about Diver Lockout.
>Date: Fri, 30 May 2003 23:17:32 +0200
>
>Vance and Michael - one question..
>
>If you work with the exit chamber in greater deeps - how you filled
>the chamber with heliox - I mean original the chamber is filled with
>air ?  Blowing out the chamber two times ? Or mix the gases ?
>
>regards Carsten
>
>Michael Wludarczyk schrieb:
> >
> > Hi Vance,
> > we worked with Perry PC8-2, two man observation Sub and Perry PC 51 -3
> > Divers lock out sub, in the
> > North Sea Oil fields, Dive Times average 8 - 10 hrs, on top side allways 
>a
> > mother ship, Sub Support,
> > we would positioning acustic beacons on the bottom and one on the subs 
>tower
> > and the mother ship
> > could monitor our position constantly. I am speeking of the end of the 
>70
> > ties , begining of the 80 ties.
> > Working depth: 80 to 200 meters, Subs working permisible depth rated to 
>300
> > meters.
> > Sub were equiped with sonar, depth gauges and uw radio coms, Sonar was 
>bad,
> > it was still using
> > thermal perper on the read out, we only used it in O visibility.
> > If you have  further questions please ask.
> > Best regards Michael W.
> >
> > >From: VBra676539@aol.com
> > >Reply-To: personal_submersibles@psubs.org
> > >To: personal_submersibles@psubs.org
> > >Subject: Re: [PSUBS-MAILIST] question about Diver Lockout.
> > >Date: Thu, 22 May 2003 07:21:28 -0400
> > >
> > >Michael W.,
> > >Interesting. It must be a sizeable DLO vehicle to carry the pumps and
> > >whatnot. Very convenient to have that ability. Which sub was this in?
> > >Vance
> >
> > _________________________________________________________________
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