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Dives to 160-165 ft
A bunch of us were sitting around planning dives last night and the subject of standard mixes came up.
When planning dives in Deco Planner to 160 the ppo2 for 21/35 is 1.23 and for 18/45 the ppo2 is 1.06. I know for the working part of the dive we keep the ppo2 to a max of 1.20. But for this depth the 21/35 gets you out of the water faster. Is the minimal increase in the ppo2 that big of a deal? Also the difference in END, CNS and OTU's is minimal. Are there any reasons, other than the pp02, why 21/35 is not an acceptable gas for a dive to this depth?
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