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Rich, you are trying to teach a pig to sing. This is a rec.scuba question in the first place. At 11:18 AM 8/16/96 -1000, Richard Pyle wrote: > >> One response I received suggested sticking to rule of thirds and indeed this >> is what I have done up till now. However this means I am surfacing with nearly >> 2/3rds of my bottom gas in reserve due to using the EAN80 for deco. I feel >> this is a little over conservative and looking to find a balance where my >> contingencies allow for one of 3 possible reg failures. Maybe that's cutting >> it a bit fine in some peoples opinion but this is what I am happy with. > >On all my deep OC mixed gas, I used to use rule of thirds independently >for each different mixture. Another way of saying "1/3 in, 1/3 out, 1/3 >in reserve" is "plan on using 2/3 of the gas and leave 1/3 in reserve". >This means I would be switching from trimix to EAN with 1/3 of my trimix >remaining, then switching from EAN to O2 with 1/3 of my EAN remaining. (I >would surface with about 9/10 of my surface-supplied O2 remaining - >keeping open the option of IWR). I didn't do this as means to minimize >wasted gas, I did this as a means to minimize wasted *mass*. (i.e, keep >it as simple as absolutely possible for the needs at hand with adequate >safety margin). > >Aloha, >Rich >-- >Send mail for the `techdiver' mailing list to `techdiver@terra.net'. >Send subscription/archive requests to `techdiver-request@terra.net'. >
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