> --- > > I have one nitrox tank (EAN32) and one air tank. > > If I were to take a 2-dive boat charter to the same wreck > (say 98'), would > it be better: > > A. Dive nitrox first dive, SI of 2 hours, then air the second > > B. Dive air the first, SI2hrs, nitrox the second > > Which is the better dive plan? > > Karen Nakamura Karen it is in *MY* Believe that plan B is better. Consider the air dive as "deeper", because the percentage of the Nitrogen is higher. The rule is the deeper dive is the first one. So do the air dive first. This way you have lower levels of Nitrogen in your body. Sotiris.