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George,
While I am not a proponent of this practise, divers who put a 30
or 40 cuft. pony on the back of their doubles, do so to have a
completely independent source of gas. The reason for this they
claim is that if you strike the isolator and break the manifold
causing a rapid gas loss, there probably will not be a knob left to
close the isolator down with. This practice is a hold over from
single outlet doubles.
As to the cause of Charlie's death; I talked to one of the mates
on the boat a week after Charlie's death. He said that Charlie had
lost the travel line that runs from the point of entry to the anchor
line. Instead of surfacing and regaining the line, he swam against
the current to the anchor line and had to let go of the anchor line
several times on his descent to go around divers hanging on the
line. The mate felt that Charlie over exerted himself trying to catch
up to one of his two buddies and swimming against the current. By
the time he reached 165', he may have had a massive CO2
headache. He signalled to his buddies he was aborting the dive,
and blackout on the way up.
While all the crap that has been posted over the last few weeks
may have been possible. I believe that a CO2 hit is a more likely
explanation for him aborting the dive at 165' and blacking out on the
way up.
Ted
From: <kirvine@sa*.ne*>
Subject: Re: Petting the Air Pony: was Re: Doria Deaths - Let's dive
some air
> Maybe also we could get one of the rocket scientist up there to tell us
> why ponying a bottle behind your back with the bottle turned on with the
> reg over your shoulder mixed in with the other two makes any sense, and
> why trying to combine a totally unnecessary bailout, a suit inflation,
> and a travel gas all in one where the gas in question, AIR, is not the
> right gas for any of those applications, and why it is a good idea to
> put a reg on an inflation bottle , why we need a pony with a dual port
> manifold, why we need it behind us, why it should be AIR, and why nobody
> up there has ever bothered to question any of this nonsense.
--
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