Mailing List Archive Mailing List Archive
No way. There's got to be a misprint. Two different kinds of deco tables never vary from each other. It's kind of interesting that the 0.7 diver is at 0.7 ppO2 for the entire dive, while the OC air diver is only at 0.7 or greater after passing 77 feet. It's also interesting that the greatest pressure change on the 160 dive occurs between the surface and 33 fsw, and there are right big pressure changes going on down to 66 fsw. And, it is interesting that the ppO2 of the 0.7 diver is 100% more that of the OC diver at 20 feet; ppO2 is 67% more for the 0.7 diver at 33 fsw compared to the OC diver; ppO2 is 11% more for the 0.7 diver at 66 fsw compared to the OC diver. Rod On Sat, 19 Oct 1996, 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'. >
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]