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It seems that you are including your decompression gas into your =
bottom mix
=20
Calculate your thirds on the bottom mix only
=20
=20
=20
=20
=20
=20
Has anyone resolved the fact that the Rule of Thirds is often (or =
seems to
be) inadequate for decompression diving? I specifically refer to =
the
observation that in decompression diving, "going" from the starting =
point
to the turn-around point of a dive often (usually?) requires far =
less time
and gas than "returning" from the turn-around point to the starting =
point
of the dive (because of the decompression obligation). This means, =
for
example, that if one of two identically breathing and kitted dive =
buddies
has a total gas failure at the turn-around point, then not both =
divers can
return safely to the starting point of the dive if they are diving =
the
Rule-of-Thirds!
=20
Does anyone have a standard "fix" or "modification" for the Rule of =
Thirds
(in the context of decompression diving) that he/she uses?
=20
Thanks in advance for your responses, and apologies if this has been
discussed earlier (I couldn't find a reference) in the Archives).
=20
Ronald
=20
P.S. The only obvious way around this seeming inadequacy with the =
Rule of
Thirds that I can see is for me to complete a formal (and =
time-consuming)
gas-matching optimization computation using a set of obvious =
constraints.
I do this as a matter of course. However, I was wondering if =
someone had
an approach that was more ad hoc (and much quicker) and less brute =
force
than mine.
=20
=20
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<DIV><FONT face=3DArial size=3D2>
<DIV><FONT face=3DArial size=3D2>
<DIV><FONT face=3D"" size=3D4>It seems that you are including your =
decompression=20
gas into your bottom mix</FONT></DIV>
<DIV><FONT face=3D"" size=3D4></FONT> </DIV>
<DIV><FONT face=3D"" size=3D4>Calculate your thirds on the bottom =
mix=20
only</FONT></DIV>
<DIV><FONT face=3D"" size=3D4></FONT></FONT> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV></DIV>
<DIV> </DIV></DIV></FONT><BR>Has anyone resolved the
fact that =
the Rule=20
of Thirds is often (or seems to<BR>be) inadequate for decompression=20
diving? I specifically refer to the<BR>observation that in=20
decompression diving, "going" from the starting =
point<BR>to the=20
turn-around point of a dive often (usually?) requires far less =
time<BR>and=20
gas than "returning" from the turn-around point to the =
starting=20
point<BR>of the dive (because of the decompression =
obligation). This=20
means, for<BR>example, that if one of two identically breathing and =
kitted=20
dive buddies<BR>has a total gas failure at the turn-around point, =
then not=20
both divers can<BR>return safely to the starting point of the dive =
if they=20
are diving the<BR>Rule-of-Thirds!<BR><BR>Does anyone have a
standard =
"fix" or "modification" for the Rule of =
Thirds<BR>(in=20
the context of decompression diving) that he/she uses?<BR><BR>Thanks =
in=20
advance for your responses, and apologies if this has =
been<BR>discussed=20
earlier (I couldn't find a reference) in the=20
Archives).<BR><BR>Ronald<BR><BR>P.S. The only obvious way
=
around this=20
seeming inadequacy with the Rule of<BR>Thirds that I can see is for =
me to=20
complete a formal (and time-consuming)<BR>gas-matching optimization=20
computation using a set of obvious constraints.<BR>I do this as a =
matter of=20
course. However, I was wondering if someone had<BR>an approach =
that=20
was more ad hoc (and much quicker) and less brute force<BR>than=20
mine.<BR><BR><BR></BLOCKQUOTE></BODY></HTML>
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