>>1233907>If you can't rely on cabin pressure you've got much bigger issuesFrom my experience, all measuring equipment says bullshit at some point. So having redundant and absolutely different type of sensor is a good idea.
Let's say that pilots ignored pressure warning for some reason, and they are starting feeling dizzy, but they don't understand that they will black out soon. And here a oxygen alarm comes on, and they will put fucking masks and do something about pressure problem, like descend to 10k.
>It's like, "how come there isn't a cockpit water level gauge showing how high up the floodwaters got before the captain drowned"Yes, but unlike water you can't feel it. I had a heater failure, and if CO alarm didn't worked - I'd not shitpost now.