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35 and 20 are fine. I use less oxygen because there is no advantage to
higher and it 1) limits range ( which you mentioned yourself) , and I don't
want a high ppo2 deep.
The only reason that deco is shorter if you do the deeper part correctly. If
you do not, then you need every bit of a longer shallow hang, and more.
You are not "blowing off" anything in my example, merely fine tuning it and
doing time where it counts. If you then want to add time, do it between 20
and the surface.
-----Original Message-----
From: Dogtrner1@ao*.co* [mailto:Dogtrner1@ao*.co*]
Sent: Saturday, February 16, 2002 7:02 AM
To: trey@ne*.co*; techdiver@aquanaut.com
Subject: Re: Standard Deco Dive
Good points. What about the percentage? I am using 35% helium, 20% O2.
Is that acceptable? Anything less than that at that depth, and I get
narced. Haven't thought about going higher on the Helium.
Interesting points on the times. 26 minutes vs 34 minutes. Thanks. will
try that next time.
I would make the following changes: slower decent, then after 20 at the
bottom, ascent at 30 fpm, consciously stopping every ten feet to achieve
this, then stop at 120-80 for 30 seconds each.
At 70, the gas switch, I would do 3 minutes to get the full effect of
the switch. See the post that talks about circulation time.
The 3 minutes each at 60,50,40
5 at30
8 at 20
ascend to 0 in 3 minutes
I notice you make a comment about the line. Get in the habit of
consciously stopping every ten feet to insure the proper ascent rate. Coming
up from depth too fast is what gives you the subclinical symptoms hours
after the dive. You trap gas in poorly perfused areas and these later swell
and react, the bubbles in them grow, the reaction presses on nerves, and you
get things like numbness in some extremities while you are sleeping that
night - not a cns hit, a cns manifestation. Skin bends would be a more
obvious consequence of skipping deep stops
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<DIV><SPAN class=3D577154011-17022002><FONT face=3DArial
color=3D#0000ff =
size=3D2>35 and=20
20 are fine. I use less oxygen because there is no advantage to higher =
and it 1)=20
limits range ( which you mentioned yourself) , and I don't want a high =
ppo2=20
deep.</FONT></SPAN></DIV>
<DIV><SPAN class=3D577154011-17022002><FONT face=3DArial
color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D577154011-17022002><FONT face=3DArial
color=3D#0000ff =
size=3D2>The=20
only reason that deco is shorter if you do the deeper part correctly. If =
you do=20
not, then you need every bit of a longer shallow hang, and=20
more.</FONT></SPAN></DIV>
<DIV><SPAN class=3D577154011-17022002><FONT face=3DArial
color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D577154011-17022002><FONT face=3DArial
color=3D#0000ff =
size=3D2>You=20
are not "blowing off" anything in my example, merely fine tuning it and =
doing=20
time where it counts. If you then want to add time, do it between 20 and =
the=20
surface.</FONT></SPAN></DIV>
<BLOCKQUOTE>
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B>
Dogtrner1@ao*.co*=20
[mailto:Dogtrner1@ao*.co*]<BR><B>Sent:</B> Saturday, February 16,
2002 =
7:02=20
AM<BR><B>To:</B> trey@ne*.co*; =
techdiver@aquanaut.com<BR><B>Subject:</B>=20
Re: Standard Deco Dive<BR><BR></FONT></DIV><FONT =
face=3Darial,helvetica><FONT=20
size=3D2>Good points. What about the percentage? I am =
using 35%=20
helium, 20% O2. Is that acceptable? Anything less than that at =
that=20
depth, and I get narced. Haven't thought about going higher on =
the=20
Helium. <BR><BR>Interesting points on the times. 26 minutes vs 34 =
minutes.=20
Thanks. will try that next time. <BR>
<BLOCKQUOTE=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px"=20
TYPE=3D"CITE"><BR></FONT><FONT lang=3D0 face=3DArial color=3D#0000ff
=
size=3D2=20
FAMILY=3D"SANSSERIF">I would make the following changes: slower =
decent, then=20
after 20 at the bottom, ascent at 30 fpm, consciously stopping every =
ten=20
feet to achieve this, then stop at 120-80 for 30 seconds each. =
</FONT><FONT=20
lang=3D0 face=3DArial color=3D#000000 size=3D2=20
FAMILY=3D"SANSSERIF"><BR><BR></FONT><FONT lang=3D0 face=3DArial
=
color=3D#0000ff=20
size=3D2 FAMILY=3D"SANSSERIF">At 70, the gas switch, I would do 3 =
minutes to get=20
the full effect of the switch. See the post that talks about =
circulation=20
time.</FONT><FONT lang=3D0 face=3DArial color=3D#000000 size=3D2 =
FAMILY=3D"SANSSERIF">=20
<BR></FONT><FONT lang=3D0 face=3DArial color=3D#0000ff size=3D2=20
FAMILY=3D"SANSSERIF">The 3 minutes each at 60,50,40</FONT><FONT =
lang=3D0=20
face=3DArial color=3D#000000 size=3D2 FAMILY=3D"SANSSERIF"> =
<BR></FONT><FONT lang=3D0=20
face=3DArial color=3D#0000ff size=3D2 FAMILY=3D"SANSSERIF">5 =
at30</FONT><FONT lang=3D0=20
face=3DArial color=3D#000000 size=3D2 FAMILY=3D"SANSSERIF"> =
<BR></FONT><FONT lang=3D0=20
face=3DArial color=3D#0000ff size=3D2 FAMILY=3D"SANSSERIF">8 at =
20</FONT><FONT=20
lang=3D0 face=3DArial color=3D#000000 size=3D2 FAMILY=3D"SANSSERIF"> =
<BR></FONT><FONT=20
lang=3D0 face=3DArial color=3D#0000ff size=3D2 =
FAMILY=3D"SANSSERIF">ascend to 0 in 3=20
minutes</FONT><FONT lang=3D0 face=3DArial color=3D#000000 size=3D2=20
FAMILY=3D"SANSSERIF"> <BR><BR></FONT><FONT lang=3D0
face=3DArial =
color=3D#0000ff=20
size=3D2 FAMILY=3D"SANSSERIF">I notice you make a comment about the =
line. Get in=20
the habit of consciously stopping every ten feet to insure the =
proper ascent=20
rate. Coming up from depth too fast is what gives you the =
subclinical=20
symptoms hours after the dive. You trap gas in poorly perfused areas =
and=20
these later swell and react, the bubbles in them grow, the reaction =
presses=20
on nerves, and you get things like numbness in some extremities =
while you=20
are sleeping that night - not a cns hit, a cns manifestation. Skin =
bends=20
would be a more obvious consequence of skipping deep =
stops</FONT><FONT=20
lang=3D0 face=3DArial color=3D#000000 size=3D2 FAMILY=3D"SANSSERIF"> =
<BR></BLOCKQUOTE><BR><BR></BLOCKQUOTE></FONT></FONT></BO
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