An X-wing targeting computer
A targeting computer, which was also referred to as a target computer, a targeting synchronizer, or a fire-control system, represented a piece of equipment utilized on board starfighters in order to support pilots when aiming their weaponry. A target was deemed susceptible to attack once it lined up with the electronic crosshairs displayed by a targeting computer's gun-sights. During the era of the Galactic Civil War, the targeting computers that were employed by the Alliance to Restore the Republic showed the distance in the unit of meters. The Imperial targeting computers used on board Imperial I-class Star Destroyers were manufactured by LeGrange.
The use of targeting computers became a requirement during aerial combat, due to the fact that all combat vessels incorporated some kind of sensor jammer as a means of preventing enemy hits. The more advanced a targeting computer was, the more rapidly it could establish a "target lock" on an opponent.
Furthermore, a targeting computer was essential to successfully intercept and destroy missiles, particularly those with very high speeds. Even with the assistance of a targeting computer, it could be extremely difficult to hit certain targets: during the Great Hyperspace Disaster, Galactic Republic Longbeam cruisers only possessed a one-in-three probability of striking debris originating from the Legacy Run that was traveling at speeds approaching that of light.