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Re: The SeizureHow about C02 buildup in the added space.. Particularly =
on the Doria.. Last time I did the Doria we were in 2 knot currents and =
kicking to get back to the line could have easily made for a C02 buildup =
and the last thing I'd want to worry about is a FFM...
Later
----- Original Message -----=20
From: Jim Cobb=20
To: Johnscha@ag*.co* ; Tech Diver=20
Sent: Thursday, July 19, 2001 10:25 AM
Subject: Re: The Seizure
Well, you have to look at the logistics of an Ocean dive and other =
issues. How would we carry a FFM? Do you use a gas block? What problems =
does introducing a gas block bring up? How about redundancy? What about =
sharing? On the whole a FFM in Ocean diving for deco sucks and, IMHO, =
introduces a whole slew of CF factors which are not warranted by the =
risks.
Jim
-------------------------------------------------------------------
Learn About Trimix at http://www.cisatlantic.com/trimix/
From: Johnscha@ag*.co*
Date: Thu, 19 Jul 2001 13:00:11 -0400
To: cobber@ci*.co*
Subject: RE: The Seizure
Jim
I agree with you, I just think there are so many variables if you =
have to do 02 in the open ocean you should be on a full face mask. I do =
02 in a cave laying on a log at 15' totally resting for 10 min max =
because I'm old.
Thanks
John
-----Original Message-----
From: Jim Cobb [mailto:cobber@ci*.co*]
Sent: Thursday, July 19, 2001 12:52 PM
To: John Schachleiter; Tech Diver
Subject: Re: The Seizure
Well, why do skydivers jump out of perfectly good airplanes? A =
calculated risk to be sure.
I have commented against 1.6 PP02 bottom mix nitrox dives for years =
and get my monkey slapped every time by the "experts" (otherwise known =
as nitrox instructors). Personally I like to keep my bottom mix as low =
as practicable (1.1 or so) and then do a deco on a somewhat higher mix. =
Many divers look at me like I am nuts for doing this, I guess because it =
means a few more minutes of deco.
But as I've said before in technical diving the thing that scares me =
the most is the PPO2 and oxtox and if I feel the least bit strange, the =
slightest twinge, I go to the back gas. I don't care if I've been on 02 =
for 2 or 10 minutes. I think it is good to have a back gas break =
schedule of 15 or 20 minutes, but the decoing diver needs to be very =
conscious of his or her physical demeanour while at the high PP02's and =
back off quickly and without hesitation, even if it means a few more =
minutes of overall deco time.
Jim
-------------------------------------------------------------------
Learn About Trimix at http://www.cisatlantic.com/trimix/
From: Johnscha@ag*.co*
Date: Thu, 19 Jul 2001 10:56:27 -0400
To: techdiver@aquanaut.com
Subject: The Seizure
All=20
I am really reluctant to jump in after reading this list for over =
a year, but since I can't get anyone to respond directly, here goes. Why =
are we doing something, that has been identified over a decade ago as =
I'll advised i.e. breathing 100% 02 in the open ocean, and particularly =
not using a full face mask ? DIR or not, there are other less risky ways =
to deco. No flames, just respond if you are inclined.=20
Thanks=20
JWS=20
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<HTML><HEAD><TITLE>Re: The Seizure</TITLE>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 5.50.4134.600" name=3DGENERATOR>
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>How about C02 buildup in the added =
space.. =20
Particularly on the Doria.. Last time I did the Doria we were in 2 =
knot=20
currents and kicking to get back to the line could have easily made for =
a C02=20
buildup and the last thing I'd want to worry about is a =
FFM...</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Later</FONT></DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dcobber@ci*.co* =
href=3D"mailto:cobber@ci*.co*">Jim=20
Cobb</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3DJohnscha@ag*.co*=20
href=3D"mailto:Johnscha@ag*.co*">Johnscha@ages.com</A> ; <A=20
title=3Dtechdiver@aquanaut.com =
href=3D"mailto:techdiver@aquanaut.com">Tech=20
Diver</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Thursday, July 19, 2001
=
10:25=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: The
Seizure</DIV>
<DIV><BR></DIV>Well, you have to look at the logistics of an Ocean =
dive and=20
other issues. How would we carry a FFM? Do you use a gas block? What =
problems=20
does introducing a gas block bring up? How about redundancy? What =
about=20
sharing? On the whole a FFM in Ocean diving for deco sucks and, IMHO,=20
introduces a whole slew of CF factors which are not warranted by the=20
=
risks.<BR><BR> Jim<BR>--------------------------------------
--=
---------------------------<BR>Learn=20
About Trimix at http://www.cisatlantic.com/trimix/<BR>
<BLOCKQUOTE><BR><B>From: </B>Johnscha@ag*.co*<BR><B>Date:
</B>Thu, 19 =
Jul=20
2001 13:00:11 -0400<BR><B>To: =
</B>cobber@ci*.co*<BR><B>Subject:=20
</B>RE: The Seizure<BR><BR></BLOCKQUOTE><BR>
<BLOCKQUOTE><FONT color=3D#0000ff><FONT size=3D2><FONT =
face=3DArial>Jim<BR>I agree=20
with you, I just think there are so many variables if you have to do =
02 in=20
the open ocean you should be on a full face mask. I do 02 in a cave =
laying=20
on a log at 15' totally resting for 10 min max because I'm=20
old.<BR>Thanks<BR>John<BR></FONT></FONT></FONT><BR><BR>
<BLOCKQUOTE><FONT size=3D2><FONT face=3DTahoma>-----Original=20
Message-----<BR><B>From:</B> Jim Cobb=20
[mailto:cobber@ci*.co*]<BR><B>Sent:</B> Thursday, July 19, =
2001=20
12:52 PM<BR><B>To:</B> John Schachleiter; Tech =
Diver<BR><B>Subject:</B>=20
Re: The Seizure<BR><BR></FONT></FONT></BLOCKQUOTE>Well,
why do =
skydivers=20
jump out of perfectly good airplanes? A calculated risk to be =
sure.<BR><BR>I=20
have commented against 1.6 PP02 bottom mix nitrox dives for years =
and get my=20
monkey slapped every time by the "experts" (otherwise known as =
nitrox=20
instructors). Personally I like to keep my bottom mix as low as =
practicable=20
(1.1 or so) and then do a deco on a somewhat higher mix. Many divers =
look at=20
me like I am nuts for doing this, I guess because it means a few =
more=20
minutes of deco.<BR><BR>But as I've said before in technical diving =
the=20
thing that scares me the most is the PPO2 and oxtox and if I feel =
the least=20
bit strange, the slightest twinge, I go to the back gas. I don't =
care if=20
I've been on 02 for 2 or 10 minutes. I think it is good to have a =
back gas=20
break schedule of 15 or 20 minutes, but the decoing diver needs to =
be very=20
conscious of his or her physical demeanour while at the high PP02's =
and back=20
off quickly and without hesitation, even if it means a few more =
minutes of=20
overall deco=20
=
time.<BR><BR> Jim<BR>---------------------------------------------
--=
--------------------<BR>Learn=20
About Trimix at http://www.cisatlantic.com/trimix/<BR>
<BLOCKQUOTE><BR><B>From: </B>Johnscha@ag*.co*<BR><B>Date:
</B>Thu, =
19 Jul=20
2001 10:56:27 -0400<BR><B>To: =
</B>techdiver@aquanaut.com<BR><B>Subject:=20
</B>The Seizure<BR><BR></BLOCKQUOTE><BR>
<BLOCKQUOTE><BR><FONT size=3D2><FONT
face=3DArial>All</FONT></FONT> =
<BR><FONT=20
size=3D2><FONT face=3DArial>I am really reluctant to jump in after =
reading=20
this list for over a year, but since I can't get anyone to respond =
directly, here goes. Why are we doing something, that has been =
identified=20
over a decade ago as I'll advised i.e. breathing 100% 02 in the =
open=20
ocean, and particularly not using a full face mask ? DIR or not, =
there are=20
other less risky ways to deco. No flames, just respond if you are=20
inclined.</FONT></FONT> <BR><BR><FONT size=3D2><FONT=20
face=3DArial>Thanks</FONT></FONT> <BR><FONT size=3D2><FONT
=
face=3DArial>JWS=20
=
<BR></FONT></FONT><BR><BR></BLOCKQUOTE><BR><BR></BLOC
KQUOTE><BR></BLOCKQU=
OTE></BODY></HTML>
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