On 25 July 2016 at 09:33, John Van Ostrand <[email protected]> wrote:
> > Although my Cochran offers very generous amounts of no-deco time the one > conservative feature is its no-fly time. At the end of a week of > live-aboard diving it often displays no-fly times well over 24 hours. > > I can only guess that it's offering desaturation time. The fact that in > practice a 20 tissue model no-fly time is longer than the 16 tissue model > also suggests it's a desautration level and the longer tissues of the 20 > tissue model means longer desat times. > > > In the DAN Flying After Recreational Diving workshop proceedings, Mike Cochran said that the Cochran dive computer calculates no-fly time as time it takes for all tissues to reach ambient pressure (i.e. desaturate) then add 12 hours. That sounds like a conservative approach and is no doubt why your dive computer gives long no-fly times. p82 (p83 of the pdf) https://www.diversalertnetwork.org/files/FADWkshpBook_web.pdf He didn't say what they consider to constitute having reached ambient pressure (x half lives or a maximum difference between tissue and ambient partial pressure). R
_______________________________________________ subsurface mailing list [email protected] http://lists.subsurface-divelog.org/cgi-bin/mailman/listinfo/subsurface
