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I first came across the idea of a deep washout stop on a tri-mix course I did towards the end of last year. As far as I have found out by asking around the people I know it is an idea that seems to have come out of using the proplanner software to calculate decompression tables and is something that was originated by Kevin Gurr (IANTD UK). I was wondering if anyone else is using this technique, if it is widely known, or if it has a different name and is used elsewhere. A deep washout is basically a 3 minute stop on travel mix at the 1.6pp02 depth for the travel mix. For example a 3 minute stop at 30m (90ft) on 40% Nitrox. This has the effect of significantly reducing the depth of the first stop. On an eight minute bottom time on trimix the first stop without a deep washout would be at 21m ( 63ft). After a deep washout the first stop is at 9m ( 27ft). I can provide a more detail on the whole dive profile if anyone is interested. Cheers, Andy H. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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