Richard, in response to your question about PPO2, I would not plan above 1.4, with that being the absolute deepest expected depth to hit, so the operational ppo2 would be more like 1.2. For deco, I would not plan for more than 1.6 at the beginning of a gas switch, like 50/50 at 70. In practice, I actually start my 50/50 at 60, and I put a little air on top of my O2, and stay at 18 feet. I could care less about getting bent, but I don't want to get killed doing something stupid because I was a deco weenie. - G
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