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TheGrappler (talk | contribs) Aircraft gunsights compensated for target lead before invention of HUDs Tags: Mobile edit Mobile web edit |
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'''Deflection shooting''' is a technique of [[shooting]] ahead of a moving target, also known as '''leading the target''', so that the target and [[projectile]] will collide at a predicted point. This technique is only necessary when the target will have moved enough to significantly displace its position during the time the projectile would take to reach the target, which can become the case [[long range shooting|over long distances]] (e.g. a long [[sniper]] shot), due to fast moving targets (e.g. an opposing aircraft in an aerial [[dogfight]], or [[anti-aircraft]] fire), or while using relatively slow projectiles (e.g. a [[crossbow bolt|bolt]] shot from a [[crossbow]], or a [[basketball (ball)|basketball]] thrown to a running teammate).
[[Gyro gunsight]]s developed for aircraft of the [[Second World War]] displayed a [[reticle]] that compensated for target lead. Modern [[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 speed and agility of modern aircraft, compared to the days when targeting was less advanced.
In [[artillery]], deflection is also used against fixed targets to compensate for [[windage]] and range. Due to the [[Earth's rotation]], surface points have different velocities and curved motion, leading to apparent [[Coriolis effect|Coriolis drift]] of a long-range target.
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