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3) we "SIT" on the 70 foot stop for quite a bit longer than is suggested by theory. The reason is we want to use that wide open oxygen window for all it is worth down there to both clear the slate as much as possible, and to move that ceiling again quite a bit so that we can abbreviate the stops above as their ppo2 declines, rather than lengthening them as either Bulhmann or bubble mechanics would indicate - real life says we are correct. In fact, I have SKIPPED up to 100 minutes of our 40 foot stops with no repercussions, and Lucy Ho can vouch for me on this ( and the doppler says so). The other reason is that we want to give the blood a chance to totally circulate with the new gas. While it hits the key body parts immediately ( spine, heart, brain), it takes a couple of minutes to get to everything properly. We do not want to hammer high popo2's, we want to use them to our advanntage. George, Does this work because the saturation of nitrogen is low in the system due to using the higher amount of He in the mix? Everything taught to this point has been that the deeper stops saturate the slower compartments and therefore should add time to the shallower stops instead of subtracting from them. Regards, Don -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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