Breathe Easier - Vanilla [Not Supported]

UPDATE: V 1. 4 * Update to match current Live Patch - USAGE - The mod requires a new game for the air quality changes to take effect, based on feedback. -SUMMARY- Brings more realism for ship submerged operations time and performance of the potassium filters used for atmospheric regeneration. -THE WHY- First, it is important to understand that the AIR QUALITY meter is NOT an OXYGEN meter. Think of it more as countdown to unlivable levels of noxious gasses such as - predominantly - carbon dioxide. The crew passing out and, if not dealt with, dying is not due to lack of oxygen, but from hypercapnia (CO2 buildup). The vanilla game is setup to give the ship roughly six hours of submerged operations time before this happens. Historical records, however, clearly indicate that the expected submerged time was closer to eight to twelve hours. Since the game has a very simplistic way of modeling this - a single atmosphere meter that encapsulates off these differing factors - there is only a single variable in the game files that controls this. To better reflect the reality, I have basically "extended" the meter itself to a base of approximately 12 hours (depending on exact crew composition and POWs onboard). Secondly, the game only gives a single way of dealing with the CO2 buildup - potassium absorbers. In reality, there were several other ways to assist in atmospheric regeneration, but this is the one we have to work with (for, likely, the sake of simplicity). The absorbers, however, are far too weak to have any substantive effects on any given dive. The expected submerged time could, in theory, last as long as 45 hours (though there are some stories that say it could be up to 72 hours) before an actual lack of oxygen kills the crew through hypoxia... but since we don't HAVE an oxygen meter, we'll just have to make do. I've done this by extending the working time of an absorber to 180 seconds, meaning that you can fully "recharge" your atmosphere with abou