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From: <gmiiii@in*.co*>
Date: Sat, 19 Oct 1996 17:02:13 -0700
Subject: Re: 0.7 ATA deco tables vs. Air/O2
To: cherf@ci*.co* (Scott Cherf), techdiver@terra.net

 The "light" is that these tables are complete bullshit to start with, so you 
are conducting an exercise in futility. 

On Sat, 19 Oct 1996, cherf@ci*.co* (Scott Cherf) wrote:
>I've been comparing the USN CCMGUBA tables for 0.7 ATA constant partial
>pressure O2 in N2 with my SRL accellerated air tables, and I was surprised
>to find that the USN .7 tables allow longer no deco times than the air/02
>tables.
>
>This confuses me.  I'd think that the .7 tables would have longer no
>deco times down to about 70fsw, then shorter times than air for deeper
>depths.  I based this preconception on the breakeven point for 21% O2,
>which is about 70 feet (3.3 ATM X .21% O2 = .69 ATA O2).
>
>Strangely enough, the .7 tables allow a 9 minute NDL at 160', while the
>SRL tables call for a 1 minute stop at 10 after a 5 minute exposure at 160
>on air (1.2 ATA O2).  This seems to violate all the EAD theory I was taught
>WRT O2 fraction and N2 loading.
>
>Please shed some light if posible.
>
>Thanks,
>Scott.
>
>
>--
>Send mail for the `techdiver' mailing list to `techdiver@terra.net'.
>Send subscription/archive requests to `techdiver-request@terra.net'.
>
>

George M. Irvine III
DIR WKPP
1400 SE 11 ST Ft Lauderdale, FL 33316
954-493-6655 FAX 6698
Email gmiiii@in*.co*

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