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Hello,
I use a 13 cu. ft. pony cylinder rather than 'spare air'
because it is cheaper and more useful. The cylinder cost about
$40. I purchased a slightly used regulator for $100 and added
a hose for my DUI CF200 dry suit. When diving with SCUBA, I
use the cylinder like 'spare air' but have never really had
to use it. When diving with my Miller-Dunn shallow water
helmet, I use it to inflate the dry suit. Recently, while
at Santa Catalina on the Vision dive boat, I connected the
helmet to a double 80 via a regulator and 50 feet of hose.
I lowered the helmet and tank block by a line to the sea-
bottom (42 feet deep). I descended on SCUBA with a safety
diver and videographer. I doffed the SCUBA, put on the
helmet and opened the air valve to the helmet. The pony
is used to inflate the dry suit in case of emergency. This
procedure is used to avoid using a tender on the boat and
disconnect myself from the boat for legal reasons. Anyway,
we got some good video of a helmeted diver walking around
through the kelp forest!
Norman Thomas
UC-LLNL
"Old divers never die, they just slowly sink" P.O. Box 808 L-350
-anonymous Livermore, CA 94551
(510) 422-0486
Email: norman@cm*.ll*.go*
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