The first rule of all air combat is to see the opponent first. Like the hunter who stalks his prey and maneuvers himself unnoticed into the most favourable position for the kill, the fighter in the opening of a dogfight must detect the opponent as early as possible in order to attain a superior position for the attack.
Adolf Galland (1954). “The first and the last: the rise and fall of the German fighter forces, 1938-1945”
