Deflection (ballistics)
Deflection is a technique used for effectively propelling a projectile at a moving target, also known as leading the target , i.e. shooting ahead of a moving target so that the target and projectile will collide. This technique is only necessary when the target will have moved a sufficient distance to displace its position during the time the projectile would take to reach the target's range. This can become the case over long distances (e.g. a distant target for a skilled sniper), due to fast moving targets (e.g. an opposing aircraft in an aerial dogfight), or while using relatively slow projectiles (e.g. a crossbow bolt or a basketball thrown to a running teammate). Modern day fighter aircraft have automated deflection sights, where a computer calculates lead and projects the solution onto a head up display (HUD). The visual assistance with targeting the gun is offset by the enormous speed and agility of modern aircraft, compared to the days when targeting was less advanced
