Unidentified Executor - class Star Dreadnought A prototype Imperial " Executor " - class Star Dreadnought was fitted with multiple cloaking devices and underwent construction over Fondor in 3 ABY . Characteristics . The ship had several similar characteristics to the " Executor " - class Star Dreadnought , although there were some differences : In addition to being equipped with the cloaking devices , various areas of the ship were also left exposed that weren ' t regularly open - areas , such as near the stern of the ship and at the bow . In addition , from the presence of multiple red horizontal floor girders in the ship , there were also plans to narrow down and separate various trenches . Because the cloaking devices were exposed , they were vulnerable targets . However , this was largely compensated with several turbolaser turret batteries surrounding the area to outright remove the chance of an aerial bombardment from starfighters and / or capital ships , as well as mitigate the chances of a starfighter commencing a strafing run to destroy the cloaking devices . Like the " Terror " , it also possessed three cloaking devices that allowed the ship to become invisible . One was located close to the bow of the ship ; the second was located directly below the ship ' s command tower ; and the third was located at the stern of the ship . The cloaking devices , however , were connected to the power generator , which makes them a crippling weakness to the ship should all of them be destroyed , resulting in its destruction , as Rogue Squadron demonstrated during its mission . Armament . The vessel was armed with a number of turbolaser towers that provided defense during its construction . Though the tower defenses could not prevent an assault on the exposed cloaking devices , they made the gauntlet very dangerous for attacking Rebel fighters . The turrets could easily target starfighters who flew too high above the Dreadnought ' s surface . Many of the turbolaser turrets were put on towers that were higher than normal . History . Despite Kuat Drive Yards being granted exclusive development rights to any and all Super Star Destroyer - style ships ( including the " Executor " - class Star Dreadnought ) after the " Executor " completion , the Empire nonetheless somehow managed to grant permission for Fondor Shipyards ( the ones who finished development of the " Executor " ) develop a variant of the " Executor " - class Star Dreadnought line that was equipped with cloaking technology . In actuality , the vessel was made as part of a ruse by Emperor Palpatine to give the Rebel Alliance an easy victory that would increase their daring before the climactic Battle of Endor . The shipyard that the prototype was berthed in was surrounded by an extensive network of space stations fitted with deflector shield generators . In 3 ABY , an initial Rebel strike team blasted their way through one of the stations , with an unmanned GR - 75 medium transport ramming the dock ' s primary control center . Having fought their way through the protective shielding system , the Rebel fighters , led by Wedge Antilles , managed to knock out three main cloaking devices on the unfinished Star Dreadnought , which caused it to explode . Behind the scenes . The " Executor " - class Star Dreadnought with the cloaking devices appears in the 2003 video game " " .