The Harbinger, a renowned Imperial I-class Star Destroyer belonging to the Imperial Navy, gained notoriety as one of the few Star Destroyers ever to be hijacked by the forces of the Rebel Alliance.
Measuring 1,600 meters in length, the Harbinger conformed to the typical dimensions of an Imperial-class Star Destroyer. Originally, its armament included turbolaser batteries, ion cannons, and a multitude of tractor beam projectors. Prior to its hijacking, the Harbinger underwent modifications, specifically the replacement of its tractor beam targeting array with a communications tower.
Following the battle of Yavin, the Star Destroyer spent several months stationed above an unidentified planet, serving as a carrier for TIE fighters.