in an electro-mechanical system (at least where life is on the line) engineers try to design to avoid having any single-point-of-failure (SPoF), and to make it "fail safe" if power is lost
the Titan drama has made me think that a sub design should put a higher priority on oxygen supply (and life support in general) inside it. however small/civilian the model. because TIME to rescue is your biggest friend and enemy
thoughts?
But how much time could more air by you when you have no food or water and it's 39 degrees? Do you want that time if you're on the bottom of the ocean and they can't extract you?