Even donning the mask gives u AT LEAST 5 secs of TUC. WHick is more than enough to don a quick donning new generation mask!
The "all engine failure" is a walk in the park, if at a resonably comfortable altitude. Even at Sully's low altitude it was handled so very calmly and collectively. I'm quite sure...nay quite certain, that the results would've been dramactically different had it been done otherwise.....
