Gunsite instructor Ed Stock explains the outdoor ready position with a shotgun. This position is also compatible with a rifle or carbine. With outdoor ready the idea is to be in a position from which you can readily assume a shooting position but where your vision is unimpeded. The position could also be called “hunter ready.”
The key, as Ed explains, is to keep your eyes just above the sights and when you turn and scan the muzzle of your gun stays between your eyes and what you are looking at.