As I sit here this afternoon, I am watching a real time feed of my kids flight heading to Asia. Right now it is over Greenland. I was just wondering about the following (god forbid): What if the plane had some malfunction and needed to land pronto (ala Capt. Sully) and did a perfect belly glide on the ice up north. Temp in the deep frost category. Say -20 or -30 F. It would easily be half a day to a full day before someone got up there. What would be the key techniques to staying alive in a fully equipped 777? I am gonna assume they have lost all power. Any thoughts?