If the DCS research community can develop guidelines they are willing to put their names on then maybe it can be incorporated into computers with freediving modes?
It seems there are two major categories, deep competitive apnea and relatively shallow high frequency/Taravana. It wouldn't take much for modern computers to incorporate an additional algorithm on top of the O2/air/Nitrox/Trimix algorithms that are already in memory.
Deep competitive apnea divers have had very high awareness for more than a decade but there are a lot of freedivers like me that happily dive for game all day without a care — except for shallow water blackout and whitey attracted by our catch.
