Like I said in an earlier post, if the aspiring tech diver does not pick up
a few books and do some research on the web about deco theory and what you
are doing to your body when deco diving you are either a total idiot
half-wit moron or you have a deathwish.

Into which category do you fall, Alain? This is really basic stuff, I mean
deco theory 101. Hopefully you stay out of the water Alain, guys like you
croaking gives tech diving a bad name.

 -------------------------------------------------------------------
 Learn About Trimix at http://www.cisatlantic.com/trimix/

> From: Alain T=E9sio <alain@on*.or*>
> Date: Fri, 20 Apr 2001 05:12:51 -0500
> To: Techlist <techdiver@aquanaut.com>
> Subject: Re: RE: Counter diffusion
>=20
> Is there a real hyperbaric specialist who can back me up ?
> I'm bored to read always the same replies for wkpp
> guys who are full of themselves and shout louder.
>=20
>=20
>=20
> --------------------------- Contents of original message
> --------------------------
>=20
> Subject: RE: Counter diffusion
> Date: Fri Apr 20, 2001 04:53 AM
> From: Trey <trey@ne*.co*>
>=20
>=20
>> Total and complete bullshit. This is the stupidest thing I have read on =
here
>> in years. Partial pressures are not going to create bubbles, only absolu=
te
>> differentials. Otherwise we would all get bent going to oxygen, right? Y=
ou
>> obviously do not dive, do you.
>>=20
>> This is a fairy tale used to explain why misfits get bent. It is total a=
nd
>> complete bullshit. We in WKPP do dives involving five gas changes and th=
e
>> fastest deco from saturation on the planet, and nobody gets bent in any
>> fashion.
>>=20
>> If this horseshit were even close to true, we would not be using deco ga=
ses,
>> now would we.
>>=20
>> -----Original Message-----
>> From: Alain T=E9sio [mailto:alain@on*.or*]
>> Sent: Thursday, April 19, 2001 6:38 PM
>> To: scottk@nw*.co*; Techlist
>> Subject: Re: Counter diffusion
>>=20
>>=20
>> Counter diffusion occurs when switching gases, the common
>> picture is "isobaric counter diffusion" because bubbles
>> appear though you don't change the depth, which can't happen
>> in theory with no gas change :
>> when you change from nitrox to heliox, as helium diffuses
>> faster than nitrogen gases out, for some time the total
>> partial pressure of inert gases will increase which can
>> mean bubbles.
>>=20
>> It isn't something which is absolutely required to know
>> for tech diving, at least if you follow the common
>> procedures and don't play the random gas wizard, but it's
>> a must for hyperbaric specialists.
>>=20
>> They know how to deal with  decompression illness with gases
>> other than air, at least in Europe when professional divers
>> use heliox for 30 years, however it may be a problem
>> in areas having experience only with recreational
>> diving.
>>=20
>> If there is one thing to remember, it is that you shouldn't
>> breath nitrox when you go to the chamber after of a
>> trimix accident.
>>=20
>> The other way is ok though, it's essentially a specialist
>> affair, but using heliox 50 for air accident is ok.
>>=20
>> Alain
>>=20
>> ----- Original Message -----
>> From: "Scott" <scottk@nw*.co*>
>> To: "Techlist" <techdiver@aquanaut.com>
>> Cc: "Trey" <trey@ne*.co*>
>> Sent: Thursday, April 19, 2001 6:38 PM
>> Subject: Counter diffusion
>>=20
>>=20
>>> George,
>>>=20
>>> Can you put the issues of "counter diffusion" into language a Jarhead c=
an
>>> understand?
>>>=20
>>> I was accosted this past week by a "Master Diver" who warned us that "I=
f
>> you
>>> have to take a chamber ride after breathing that shit (helium) it will
>> kill
>>> you."
>>>=20
>>> I was so stunned by his position and attitude that I just nodded and
>>> listened.
>>>=20
>>> Plus, I have no idea what counter diffusion is, or if or why it is an
>> issue
>>> to SCUBA divers.
>>>=20
>>> Scott
>>>=20
>>> --
>>> Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
>>> Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'=
..
>>=20
>> --
>> Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
>> Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
>=20
>=20
>=20
> --
> Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
> Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
>=20


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