Mailing List Archive Mailing List Archive
This is a multi-part message in MIME format.
------=_NextPart_000_0010_01BEF44B.C74EB020
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Steve,
So let me get this straight: 1) Barry was teaching a trimix course =
while using a CCR. 2) Barry's other instructor did a normal dive and =
deco, this implies either solo diver or abandonding Barry when he had a =
problem. Does anyone still have a question why an instructor should not =
be ona rebreather while teaching any course?
All things considered Steve, you were very lucky to live through such a =
major violation of Rules #1 & 2.
Errol
-----Original Message-----
From: Steven Bliim <Steven.Bliim@Mc*.co*.au*>
To: techdiver@aquanaut.com <techdiver@aquanaut.com>
Date: Tuesday, August 31, 1999 11:40 PM
Subject: Rebreather problems?
=20
=20
The following is reported to have occurred in Sydney, Australia in =
early August. One might say that Barry should buy a lottery ticket after =
this one.
=20
=20
=20
What a weekend! In Sydney to start my trimix course with Barry =
Hallett at=20
> Southern Cross, Saturday was dead flat so bugger the course we did =
two 48m=20
> dives with a fairly hefty surface interval, 20m viz on the =
Coollooli=20
> and the Dee Why. Did some theory and mixing that afternoon, then =
Sunday=20
did=20
> another 48m dive on the wreck next to the Dee Why (Meggol), on =
21.5/22=20
> Trimix, I had a lovely dive. Barry on his Buddy Inspiration fully =
closed=20
> circuit rebreather however had a less than happy day (See below =
for the=20
> full details). At almost 50m, Barry's 'breather gave him pure O2, =
yup, 6.0=20
> atm, needless to say he suffered major nausea, visual =
disturbances, and=20
> what he describes as like being hit with 240v, twice. He suffered =
two big=20
> hits but was able to make it to the surface on open circuit, =
negating=20
> almost 30min of deco, no signs or symptons experienced - he's a =
very lucky=20
> man. Not to be outdone, his other instructor, Kosta, also on a =
Buddy=20
> Inspiration surfaced after a normal dive and deco, and took a mild =
shoulder=20
> hit of DCS, so he went down for another 20min of deco, surfaced =
with no=20
> other problems. This is also after their new girl in the shop =
took a foot=20
> hit on Wed after a 48m dive, normal profile with the only =
contributing=20
> factor being she had cold feet - she's now going to buy a drysuit! =
>=20
> My dive went uneventfully, trimix is a lovely gas for clearing the =
head=20
and=20
> focussing clearly, and completing tasks much more quickly. Looking =
forward=20
> to using it on the 70m dives next month, then......!=20
>=20
> Barry's big day out: (don't read on if details bore you!)=20
>=20
> Barry's Inspiration uses three separate electronically controlled =
O2=20
> sensors and a polling method. Near the start of the dive and on =
the=20
bottom=20
> at nearly 50m, one sensor went u/s, and the computer asked him if =
he=20
wanted=20
> to recalibrate all three, and in his self admitted complacency, he =
answered=20
> yes. He later realised the computer was asking him a question akin =
to "Do=20
> you want to suffer an enormous CNS O2 seizure and die, or not?" =
As the O2=20
> set point for the dive was 1.4, and as he had just told the =
sensors that=20
he=20
> was now only at 1 atm, and therefore PO2 of 0.21, the 'breather =
then=20
> commenced adding pure o2 into the loop, with the expected results =
of two=20
> major seizures. He should not be alive to tell this story, as on =
the=20
> ascent, having bailed to open circuit, his bailout gas supply =
exhausted=20
(he=20
> suspects it wasn't full to start with - error #2), luckily he had =
made it=20
> to the ascent line and was able to receive gas from another diver, =
but he=20
> continued to the surface fearing another major hit, which actually =
> occurred. He was also not cognitive of one divers efforts to give =
him=20
air,=20
> despite being right in his face. Barry will freely admit he f___d =
up, due=20
> to complacency. He still has faith in the rebreather, and is not =
shy to=20
> tell people what he did wrong in orer to let other people learn =
from his=20
> mistakes. Here endeth the lesson.=20
>=20
>=20
=20
Regards=20
Steven Bliim=20
=20
------=_NextPart_000_0010_01BEF44B.C74EB020
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
<HTML>
<HEAD>
<META content=3Dtext/html;charset=3Diso-8859-1 =
http-equiv=3DContent-Type><TITLE>Rebreather problems?</TITLE><!DOCTYPE
=
HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<META content=3D'"MSHTML 4.71.1712.3"' name=3DGENERATOR>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Steve,</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>So let me get this =
straight: 1)=20
Barry was teaching a trimix course while using a CCR. 2) Barry's other=20
instructor did a normal dive and deco, this implies either solo diver or =
abandonding Barry when he had a problem. Does anyone still have a =
question=20
why an instructor should not be ona rebreather while teaching any=20
course?</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2></FONT><FONT =
face=3DArial size=3D2>All=20
things considered Steve, you were very lucky to live through such a =
major=20
violation of Rules #1 & 2.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Errol</FONT> </DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: =
5px">
<DIV><FONT face=3DArial size=3D2><B>-----Original =
Message-----</B><BR><B>From:=20
</B>Steven Bliim <<A=20
=
href=3D"mailto:Steven.Bliim@Mc*.co*.au*">Steven.Bliim@McCABES.com.au</=
A>><BR><B>To:=20
</B><A =
href=3D"mailto:techdiver@aquanaut.com">techdiver@aquanaut.com</A>=20
<<A=20
=
href=3D"mailto:techdiver@aquanaut.com">techdiver@aquanaut.com</A>><BR>=
<B>Date:=20
</B>Tuesday, August 31, 1999 11:40 PM<BR><B>Subject:
</B>Rebreather=20
problems?<BR><BR></DIV></FONT>
<P><FONT color=3D#000000 face=3DArial size=3D2>The following is =
reported to have=20
occurred in Sydney, Australia in early August. One might say that =
Barry=20
should buy a lottery ticket after this one.</FONT></P><BR>
<P><FONT color=3D#000000 face=3DArial size=3D2>What a weekend! =
In Sydney to=20
start my trimix course with Barry Hallett at</FONT> <BR><FONT =
color=3D#000000=20
face=3DArial size=3D2>> Southern Cross, Saturday was dead flat so =
bugger the=20
course we did two 48m</FONT> <BR><FONT color=3D#000000
face=3DArial =
size=3D2>>=20
dives with a fairly hefty surface interval, 20m viz on the Coollooli =
</FONT><BR><FONT color=3D#000000 face=3DArial size=3D2>> and
the =
Dee Why. Did=20
some theory and mixing that afternoon, then Sunday</FONT>
<BR><FONT=20
color=3D#000000 face=3DArial size=3D2>did</FONT> <BR><FONT =
color=3D#000000=20
face=3DArial size=3D2>> another 48m dive on the wreck next to the =
Dee Why=20
(Meggol), on 21.5/22</FONT> <BR><FONT color=3D#000000 =
face=3DArial=20
size=3D2>> Trimix, I had a lovely dive. Barry on his Buddy=20
Inspiration fully closed</FONT> <BR><FONT color=3D#000000 =
face=3DArial=20
size=3D2>> circuit rebreather however had a less than happy day =
(See below=20
for the</FONT> <BR><FONT color=3D#000000 face=3DArial
size=3D2>> =
full details).=20
At almost 50m, Barry's 'breather gave him pure O2, yup, 6.0</FONT> =
<BR><FONT=20
color=3D#000000 face=3DArial size=3D2>> atm, needless to say he =
suffered major=20
nausea, visual disturbances, and</FONT> <BR><FONT color=3D#000000 =
face=3DArial=20
size=3D2>> what he describes as like being hit with 240v, =
twice. He=20
suffered two big</FONT> <BR><FONT color=3D#000000 face=3DArial =
size=3D2>> hits=20
but was able to make it to the surface on open circuit, =
negating</FONT>=20
<BR><FONT color=3D#000000 face=3DArial size=3D2>> almost 30min of =
deco, no=20
signs or symptons experienced - he's a very lucky</FONT>
<BR><FONT=20
color=3D#000000 face=3DArial size=3D2>> man. Not to be outdone, =
his other=20
instructor, Kosta, also on a Buddy</FONT> <BR><FONT
color=3D#000000 =
face=3DArial=20
size=3D2>> Inspiration surfaced after a normal dive and deco, and =
took a=20
mild</FONT> <BR><FONT color=3D#000000 face=3DArial =
size=3D2>shoulder</FONT>=20
<BR><FONT color=3D#000000 face=3DArial size=3D2>> hit of DCS, so =
he went down=20
for another 20min of deco, surfaced with no</FONT> <BR><FONT =
color=3D#000000=20
face=3DArial size=3D2>> other problems. This is also after =
their new=20
girl in the shop took a foot</FONT> <BR><FONT color=3D#000000 =
face=3DArial=20
size=3D2>> hit on Wed after a 48m dive, normal profile with the =
only=20
contributing</FONT> <BR><FONT color=3D#000000 face=3DArial =
size=3D2>> factor=20
being she had cold feet - she's now going to buy a drysuit!</FONT> =
<BR><FONT=20
color=3D#000000 face=3DArial size=3D2>></FONT> <BR><FONT =
color=3D#000000=20
face=3DArial size=3D2>> My dive went uneventfully, trimix is a =
lovely gas for=20
clearing the head</FONT> <BR><FONT color=3D#000000 face=3DArial=20
size=3D2>and</FONT> <BR><FONT color=3D#000000 face=3DArial =
size=3D2>> focussing=20
clearly, and completing tasks much more quickly. Looking =
forward</FONT>=20
<BR><FONT color=3D#000000 face=3DArial size=3D2>> to using it on =
the 70m dives=20
next month, then......!</FONT> <BR><FONT color=3D#000000 =
face=3DArial=20
size=3D2>></FONT> <BR><FONT color=3D#000000 face=3DArial =
size=3D2>> Barry's=20
big day out: (don't read on if details bore you!)</FONT>
<BR><FONT=20
color=3D#000000 face=3DArial size=3D2>></FONT> <BR><FONT =
color=3D#000000=20
face=3DArial size=3D2>> Barry's Inspiration uses three separate=20
electronically controlled O2</FONT> <BR><FONT color=3D#000000 =
face=3DArial=20
size=3D2>> sensors and a polling method. Near the start of =
the dive=20
and on the</FONT> <BR><FONT color=3D#000000 face=3DArial =
size=3D2>bottom</FONT>=20
<BR><FONT color=3D#000000 face=3DArial size=3D2>> at nearly 50m, =
one sensor=20
went u/s, and the computer asked him if he</FONT> <BR><FONT =
color=3D#000000=20
face=3DArial size=3D2>wanted</FONT> <BR><FONT color=3D#000000 =
face=3DArial=20
size=3D2>> to recalibrate all three, and in his self admitted =
complacency,=20
he</FONT> <BR><FONT color=3D#000000 face=3DArial =
size=3D2>answered</FONT>=20
<BR><FONT color=3D#000000 face=3DArial size=3D2>> yes. He later =
realised the=20
computer was asking him a question akin to "Do</FONT>
<BR><FONT =
color=3D#000000 face=3DArial size=3D2>> you want to suffer an =
enormous CNS O2=20
seizure and die, or not?" As the O2</FONT> <BR><FONT=20
color=3D#000000 face=3DArial size=3D2>> set point for the dive =
was 1.4, and as=20
he had just told the sensors that</FONT> <BR><FONT color=3D#000000
=
face=3DArial=20
size=3D2>he</FONT> <BR><FONT color=3D#000000 face=3DArial =
size=3D2>> was now only=20
at 1 atm, and therefore PO2 of 0.21, the 'breather then</FONT> =
<BR><FONT=20
color=3D#000000 face=3DArial size=3D2>> commenced adding pure o2 =
into the loop,=20
with the expected results of two</FONT> <BR><FONT color=3D#000000 =
face=3DArial=20
size=3D2>> major seizures. He should not be alive to tell =
this story,=20
as on the</FONT> <BR><FONT color=3D#000000 face=3DArial =
size=3D2>> ascent,=20
having bailed to open circuit, his bailout gas supply =
exhausted</FONT>=20
<BR><FONT color=3D#000000 face=3DArial size=3D2>(he</FONT>
<BR><FONT =
color=3D#000000=20
face=3DArial size=3D2>> suspects it wasn't full to start with - =
error #2),=20
luckily he had made it</FONT> <BR><FONT color=3D#000000
face=3DArial =
size=3D2>>=20
to the ascent line and was able to receive gas from another diver, =
but=20
he</FONT> <BR><FONT color=3D#000000 face=3DArial size=3D2>> =
continued to the=20
surface fearing another major hit, which actually</FONT>
<BR><FONT=20
color=3D#000000 face=3DArial size=3D2>> occurred. He was =
also not=20
cognitive of one divers efforts to give him</FONT> <BR><FONT =
color=3D#000000=20
face=3DArial size=3D2>air,</FONT> <BR><FONT color=3D#000000 =
face=3DArial size=3D2>>=20
despite being right in his face. Barry will freely admit he f___d =
up,=20
due</FONT> <BR><FONT color=3D#000000 face=3DArial size=3D2>>
to=20
complacency. He still has faith in the rebreather, and is not =
shy=20
to</FONT> <BR><FONT color=3D#000000 face=3DArial size=3D2>>
tell =
people what he=20
did wrong in orer to let other people learn from his</FONT> =
<BR><FONT=20
color=3D#000000 face=3DArial size=3D2>> mistakes. Here endeth the =
lesson.</FONT> <BR><FONT color=3D#000000 face=3DArial =
size=3D2>></FONT>=20
<BR><FONT color=3D#000000 face=3DArial size=3D2>></FONT> </P>
<P><FONT face=3DArial size=3D2>Regards</FONT> <BR><FONT =
face=3D"Brush Script MT"=20
size=3D5>Steven Bliim</FONT> </P></BLOCKQUOTE></BODY></HTML>
------=_NextPart_000_0010_01BEF44B.C74EB020--
--
Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]