but guys, I've seen a thirty year old fall asleep too.
Not only thirty year olds, forty and fifty as well.
My last First Officer is a case in point.
Forty two, and slips off into a snooze at a moments notice, during cruise.
Twelve hours duty is far too much for him, it seems.
Ohhhh, the poor child.
He says he can't sleep in hotac.
He had better learn, or do without a salary...and F/O duties.
Some (but certainly not all) younguns simply cannot keep up the pace, it would appear.
Tough sh!te for them, I say.