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At 09:01 14/06/00 , MHK wrote: >----- Original Message ----- >From: Mike Rodriguez <mikey@ma*.co*> > > That's what I thought. I hate it when a computer specification says > > it uses "Modified Buhlmann", then doesn't tell you what the hell the > > modification is. It might as well not tell you anything; you'll still > > have the same amount of useful information. > > >Why would you want straight Buhlman??? > >The Buhlman ZH - L16A has sixteen pair of coefficients for the sixteen >half-time compartments. Modified B and C were further added because the >mathematically ( NOTE: mathematically not empirically derived ) were found >to be not conservative enough in the middle compartments. So if you want >straight Buhlman you are likely to get bent... > >The Modified set B ( which is slightly more conservative ) is generally >useful in calculating tables and the modified set C ( slightly more >conservative ) is generally what computer use. Modified set C ( which >calculates in real time ) . > >It should also be noted that neither of the modified subset B or C will >provide for He and are only used for N2.. That's why the ZH-L12 is nice - Buhlmann incorporated the test programme with the training programmes of some nearby diving schools during the oil exploration boom and so was able to obtain hundreds of hours of empirical validation over a wide range of nitroxes, trimixes and helioxes at a range of depths and times, with a variety of decompression gasses. The shape is 'kinder' too - the stops begin deeper - though still not deep enough. rgrds billyw -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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