Friedrich Körner (36 victories) also recognised this as unique: "Shooting in a curve (deflection shooting) is the most difficult thing a pilot can do. The enemy flies in a defensive circle, that means they are already lying in a curve and the attacking fighter has to fly into this defensive circle. By pulling his aircraft right around, his curve radius must be smaller, but if he does that, his target disappears in most cases below his wings. So he cannot see it anymore and has to proceed simply by instinct." The attack was, however, carried out at close-range; Marseille dived from above, climbed underneath an opponent, fired as the enemy aircraft disappeared under his own, and then used the energy from the dive to climb and repeat the process.