so silly question i cant seem to find an answer for... do you (a) unscrew the HEV whilst underwater; (b) dive with it already unscrewed; (c) unscrew it after you resurface?
The He valve should never be opened underwater. Omega manuals for years have stated 50m water resistance with it open though. They also touted this as a “new” feature on the newest PO models...
That being said... there would never be a reason to open an He valve underwater.
Welcome to wonderful catch 22 of Deep Saturation watches.
Do I need to explain why?
so its a stupid "complication", that has literally no benefit for 99.99% of people? hmm