We have developed a BCD that does not change buoyancy with depth. This prevents runaway ascents and descents. With it you do not have to inflate and deflate the BCD during a dive. It allows the diver to precisely compensate for overweighting and the compensation is fixed regardless of depth. Details are at Home. We have not yet commercialized this technology and would like to get feedback from divers before doing so. Do you think this would be a useful feature ? Are there disadvantages we may not have thought of ?