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Don Burke schrieb: > PADI Nitrox, when taught by the book, is probably beyond at least 20% of rec > divers. ? Are you saying it is beyond the capacity of learning ? for how much % , 80 or 20 % ( Would it make that much difference , anyway ) > > EA> One now has to come up with a set of 'reductions' that would simplify > This translates to the "blind faith" method of diving. It is an invitation > to disaster. Nitrox divers are instructed to check their own mix. Many of > those barely understand the signifigance of the numbers on the "little magic > box." It will be much worse for trimix. I fully agree. > The surface interval tables present one big challenge. On the third > repetitive dive, we are already walking on thin ice by trying to represent > multiple compartments with a single letter code. At least with Nitrox, the > air surface interval tables (which are really nitrogen tables since oxygen > isn't an issue) work for every oxygen/nitrogen combination and for the first > two dives, they are adequate. Getting a table to represent helium surface > intervals wouldn't be too hard, but would an OW diver be able to switch back > and forth? Would he care to ? There would need to be different surface interval tables for > each combination of helium and nitrogen. Well, with proper design, such tables could be generated and made understood. Might look similar to surface intervall/ residual nitrogen tables. > I'm trying to picture "Lazy Elmer's Diveshop, Tattoo Parlor and Grill" in > Road Narrows, MI, giving a newbie the right gas when all he knows to ask for > is "YMCA mix 28/35", or worse yet "SSI mix B." For some reason, the image > won't come to me. I like this picture. > EA> In the pedagological sense this unifies 'gases', > > 'tables' & 'decompression' for introcudtory level > > classes & may b suitable to teach in a 20 h or so OWI > > class. > More like 100 h or so. The usual approach would be putting the students in a "safe" environment and nursing them , like venting their BCs, reinflating before ascent, and so on . Making them believe they achieved something great. Which opens the purses. - Matthias -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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