Dutchy

I don't have the answer, just considerations. When not considering filming the manually flown eCCR to me feels like the safest available option when combined with the I_kick_myself_in_the_butt_when_the_solenoid_fires_ attitude. But it comes at a price. Taskload...
For filming the closest you can get to that I guess is the bleed and parachute option but only when combined with the "I will abort my dive to immediately punish myself severely for being stupid enough to let my ppO2 drop that far attitude. If you miss out on that attitude you are effectively trusting the machine as if it were a normal eCCR.

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