But they are not usung mix , they are using AIR. 

At what depth does DIR move from air to mix ? 17 , 100 , 110 ,120 , 130 ,
other ?


At 02:01 PM 4/12/2000 -0400, Bill Lais wrote:
>Keep in mind that the only time you notice the 15% difference is when 
>you're at 300 feet on air <g>.
>
>On a related note, I love to read the ridiculous articles in dive magazines 
>that compare regulator performance.  They try to find the best breathing 
>reg at depths of like 150+ using air.  People forget (or simply don't know) 
>that when you DIR (add a bunch of helium at depth), the friction is greatly 
>reduced due to the overall reduction in fluid density due to the helium.
>
>-  Bill
>
>-----Original Message-----
>From:	Harris, Paul [SMTP:pharris@cr*.pl*.uk*]
>Sent:	Wednesday, April 12, 2000 10:52 AM
>To:	'Drew Glasbrenner'; 'trey@ne*.co*'; 'Cave listserv'
>Subject:	RE: Back Gas Regulators
>
> << File: ATT00005.txt; charset = windows-1252 >>
>
>The other reason people (I did anyway) insist on using the end port is that
>in the manual you are told that you will get ~15% better performance from
>that port compared to the others on the turret.
>
>JJ put me straight there :-), I've never noticed any difference apart from
>the
>fact that I did not get the tight bend when sharing.
>
>r
>Paul
>
>

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