Good. I don't want any crowds on all those great Lake Superior wrecks at 175. LOL The rest of you stay up at 150 and practice.
New GUE standard gas mixes?
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Good. I don't want any crowds on all those great Lake Superior wrecks at 175. LOL The rest of you stay up at 150 and practice.
a 40 of EAN50 is sufficient for a 20 minute 190' dive... unless you are new/cold OW/shortfilled/doing longer stops at the O2 window/doing extra time at stops
For example... I recently read Jeff's Tech 1 report and on their 14 minutes at 150' dive where they switched back to backgas because the deco gas got low.
Shane and I each take a 40 of EAN50 to 165' leaving plenty of margin.
For example... I recently read Jeff's Tech 1 report and on their 14 minutes at 150' dive where they switched back to backgas because the deco gas got low.
Shane and I each take a 40 of EAN50 to 165' leaving plenty of margin.
The card says... among other things 150'... but our final dive of the class was 165' and that is what we have limited ourselves to... so far.
No... we haven't taken the Tech 2 yet... probably next fall when Shane gets the time.
wb416
Contributor
Pug... have you ever documented your Tech 1 experience, and if so, is it available online?
None of my cards say anything about depth. I guess some agencies focus on depth more than others. LOL
Not in the sense that others have reported their DIRf and Jeff his Tech 1 experience... though I have posted vignettes in threads here and there.
MHK
Guest
Scott, thanks for pointing me in the direction of this thread. I spoke to JJ earlier today and in light of the confusion JJ recently posted something to Quest to clear up the confusion.
In summary, we all agree on standardized mixes, but the variance WRT to WKPP projects and recreational sport diving will continue as it has been.
Here's a copy of JJ's post to Quest:
Hope this helps..
I think that a previous conversation I was having with George might have
precipitated some confusion. I was talking to him about 21% mixes near 190
but did not mean to indicate that this was a combination that we used in
GUE training. Our current mixes hold well and promote the same concepts as
those by the WKPP. Sometimes presenting tools such as standard mixes gets
lost in the translation, especially when people have a very different
system as a frame of reference. The principal of standard mixes shifts the
paradigm away from the industry norm, one in which divers choose a
mystical "best mix" and where O2 is usually too high and Helium too low.
Both GUE and WKPP mixes promote 1.2 or less with the emphasis on less for
any profiles of merit. One is always encouraged to raise Helium. GUE's
mixes are slightly more geared toward common profiles. WKPP mixes relate to
dives in which the greater depth and longer dives are the norm and where it
is of paramount importance that the mixes be low in oxygen and rich in
Helium. Both are saying the same thing. In the WKP a cave that is at 200'
will usually drop to at least 240 and can easily go deeper. Therefore,
being more "precise" (meaning that one ride close to the upper PO2 or
lower Helium limit) about one's mix can be a limiting and dangerous
factor. The 21/35 mix has a 150 max where we shift to 18/45, keeping the
O2 near 1.2. Dives that are mostly at the edge of a mix should use the next
deeper mix. It is not sensible to always ride on the edge and expect not to
get cut.
Best,
JJ
In summary, we all agree on standardized mixes, but the variance WRT to WKPP projects and recreational sport diving will continue as it has been.
Here's a copy of JJ's post to Quest:
Hope this helps..
I think that a previous conversation I was having with George might have
precipitated some confusion. I was talking to him about 21% mixes near 190
but did not mean to indicate that this was a combination that we used in
GUE training. Our current mixes hold well and promote the same concepts as
those by the WKPP. Sometimes presenting tools such as standard mixes gets
lost in the translation, especially when people have a very different
system as a frame of reference. The principal of standard mixes shifts the
paradigm away from the industry norm, one in which divers choose a
mystical "best mix" and where O2 is usually too high and Helium too low.
Both GUE and WKPP mixes promote 1.2 or less with the emphasis on less for
any profiles of merit. One is always encouraged to raise Helium. GUE's
mixes are slightly more geared toward common profiles. WKPP mixes relate to
dives in which the greater depth and longer dives are the norm and where it
is of paramount importance that the mixes be low in oxygen and rich in
Helium. Both are saying the same thing. In the WKP a cave that is at 200'
will usually drop to at least 240 and can easily go deeper. Therefore,
being more "precise" (meaning that one ride close to the upper PO2 or
lower Helium limit) about one's mix can be a limiting and dangerous
factor. The 21/35 mix has a 150 max where we shift to 18/45, keeping the
O2 near 1.2. Dives that are mostly at the edge of a mix should use the next
deeper mix. It is not sensible to always ride on the edge and expect not to
get cut.
Best,
JJ
OP
I just saw that tonight myself. That definitely clears up the confusion.
Speak for yourself. I wasn't confused.
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