Personal best with the SHAR from Alert 5, during Corporate, was just less than 90 seconds (from fast asleep!). The HUD came to life as I exited the ski-jump. Mind you, there was a certain sense of urgency then.
We held two alert states, AL20 which was relaxed goon-suit in the crew room and AL5 in the cockpit. I found that it was possible to get some quality zzzzzzz by jamming my elbows in the canopy spray-ring and my fists against the side of the helmet. Plane captain was briefed to bang loudly on the side of the cockpit to wake me up for work.
Mog