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In a message dated 6/24/00 4:46:00 AM Eastern Daylight Time,
ajmarve@ba*.ne* writes:
> I dont see the point of an h valve, i either dive doubles or i dive
singles,
> if
> i cant use the single i use the doubles. I had a y valve but it never
really
> worked like i wanted it to.
Al,
H-valves provide a bit of redundancy for folks doing non-technical
penetrations into wrecks, caverns, etc. (A much better option for these
divers than carrying a pony bottle which results in more drag and are seldom
used properly anyway). They also serve as a nice transitional tool for divers
with an interest in pursuing a more serious level of diving but not quite
ready to make the move based on experience levels. Then there's also the
consideration that use of an H-valve allows one to use the same regulator
systems, and a similar configuration, whether diving a single or double tanks.
As I understand it one of the key points of DIR, and an attitude embraced
by many non-DIR divers as well, is that one takes only what they need to
accomplish a particular dive into the water. For a little 120/130 fsw dive
for 40 minutes or so, resulting in a short deco obligation, a single tank
loaded with a light trimix and a small sling bottle of 50/50 would be all
that was really needed. It should be obvious that an H-valve, combined with
a good dive partner, would provide the level of redundancy required for such
a dive.
Finally, I seem to recall either Trey, JJ or both suggesting the use of
an H-valve as the DIR approach to single tank diving. I could be wrong but
I'm realitively confident that is the case.
Bob Decker
SportDiverHQ.com
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