Novice diver here and could not find an answer on the search function to a question that came up during a recent trip to Bonaire. On this trip to Bonaire, my wife and I as well as several others using AI computers (not all the same brand) found the Nitrox pressure reading on our computers to be frequently 200-300# lower than the pressure shown on the pressure/O2 gauges used by the dive op when we checked the Nitrox percentage/air pressure. One of the experienced divers told us not to worry, that AI computers frequently showed a couple of hundred pounds low until you got down to @1000 psi at which time the pressure reading would be correct. I had never heard of that issue before, which is not surprising due to my low experience level, especially using an integrated computer. However, since I always err on the side of caution, I planned my wife's and my dives with the assumption that what we saw on the computer's gauge is what we had, regardless of what the pressure gauge showed at the OP, and regardless of what the "experienced" diver told us. Since my wife's and my gauge read the same for a given tank, it did not seem logical to me that there would be 200+ pounds more air than indicated. BTW our computers are Atmos AIs.
Thanks for any comments
Thanks for any comments