I was watching the flight patterns the other day and it occured to me that they only fly in straight lines. No curves at all. They just fly along straight, change direction, then continue on in another straight section until it is time to turn again. I know that at the intersections there is a small arc, but in general the fly always straight. It seems kind of odd to do that instead of a sort of a meandering, cruise.
I hope I described this clearly enough. What gives?
Flat…