Not only is this impractical, but it is in conflict with any reasonable outgassing for the diver and, especially, seems to make no sense, as the Dive Rite and Sherwood computers turn off and on with five feet of water pressure. But this is only the beginning of the problems. If you are on the surface for more than 10 minutes, such as during a surface swim, the computer will default and you will have to reset it with the computer's small buttons using a complex procedure you must memorize. Therefore, if you dive with the computer in default, you are told to disregard the warnings and follow common sense, even though the computer can no longer track oxygen levels for the next 24 hours. Therefore, the instructions say you should use a second computer or calculate the oxygen partial pressures yourself.
Instructions are incomplete, poorly laid out and contain errors.
Shows a no-fly symbol, but gives no time frame. No back light, but does glow when exposed to light. Default when in nitrox mode is 50 percent oxygen and 79 percent nitrogen. Although this is a new computer to Sherwood, it is clearly based on obsolete technology. The AWAC-1 is conservative on shallow single dives, liberal on single deep dives and average on multilevel dives.