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John >What is the difference between following a deco schedule produced from a set >of (computer-generated) tables, and following a deco schedule produced by a >computer on your wrist? (Apart from algorithm differences and that the >computer produces a schedule for the dive you actually did) Consider the following: * Most dive computers have built in safety as do some desk top deco programs. With some desk top deco programs one can switch off the safeties, e.g. the Abyss desk top deco program comes out of box with an assumption that the diver will ascent to 540m after the dive. Thus the table produced will keep the diver in-water on the last stop longer than if the diver were not to ascent to 540m. This post dive altitude adjustment can be set to zero. * If one inserts deep stops with a computer, the computer will add time to the deco as it considers some of your tissues to be on gassing to the extent that additional time at the shallower stops is required. From posts of some of the WKPP people, it is their practice to shorten the shallow stops not lengthen them after applying deep stops to the dive. * If you skip all or part of a stop on a computer it typically goes into violation mode and does not provide deco information. Tables are still there and available as your guide to the deco required. * Some computers only operate within certain depths, deco depths, etc Tables do not have this limitation. * Some computers penalise you for the low ambient temperatures, tables do not. David Shimell Project Manager, Sequent Computer Systems Ltd., Sandton, South Africa. Email: shimell@se*.co* <mailto:shimell@se*.co*> -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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