Squadrons are now able to take off :) You can choose single or multiple squadrons. Squadron which is taking off checks for collision with already flying squadrons. If there's flying squadron above airfield, landed squadron can't take off (unless former moves away). So if two or more squadrons are selected to take off, then they take off one after another, not the same time - first one takes off, moves away, then second takes off, moves away and so on.
