Air Asia Flight QZ 8501 Missing

[joebloggs]

Strangely, a glass of water would tell them where the true horizon was, but they rely on expensive computer information that can go AWOL if the outside tubes get blocked by ice.

Reminds me of the the time and money the Americans wasted trying to make a pen that would write in space, but costs got so high they went back to using pencils like the Russians