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Claudia Milz wrote: > > Simon, > > We in CO have the same problem (4000ft to 10,000ft+). I asked JJ if > decoplan will offer the high altitude features in the future and > yes, they are working on it. > Uhh?! Decoplan actualy can calculate schedules for altitutde, you have to reduce the Surface Pressure (found in Dive Plan Preferences) to the aproporiate amount. However, it might get tricky if you have to travel above a mountain that is higher than your diving location. A good estimate for the ambient pressure at altitude is: Pamb = P0*e^(-altitude/H_pn) Pamb [mbar] altitude [m] P0 = 1013mbar H_pn = 8434.5m e = 2.7182... For my private freedom I subtract 50mbar from the calculated value to account for low's (ie. for 3300ft = 1000m I calculate my deco schedules with 850mbar). For high altitude you will experience the the stops will actualy start earlier and that the last stop is usualy a few minutes longer. You will also want to slow down the final accent to surface as much as possible. For high altitude dives I generaly spend 4min at 2m (7ft) before very slowly heading to the suface. I did not encounter any problems so far, but my experience is limited to altitude diving in the 3000-5500ft range. Regards, Frank -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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