Interdictor - class cruiser The Interdictor " - class cruiser , also known as the hyperspace interdiction cruiser and the Interdictor " - class Sith Destroyer , was among the most numerous capital ships seen in action with the Sith Navy during and after the Jedi Civil War . Characteristics . The " Interdictor " - class was 600 meters long and featured a hull that split into two structures , one dorsal and one ventral . The ship was propelled by three main thrusters and four auxiliary thrusters , similar to the " Imperial " - class Star Destroyer . Each ship was commanded from a sternward tower . The " Interdictor " - class cruiser was armed with 5 medium Turbolaser cannon batteries , 6 light point - defense cannon batteries , 3 tractor beam batteries , and 4 gravity well projectors . The infamous " Interdictor " - class cruiser and Sith warship , the " Leviathan " was equipped with 20 quad laser cannons , 4 turbolaser cannons , 2 ion cannons and a tractor beam projector . Despite the timespan between designs , the " Interdictor " - class cruiser was comparable in power to Star Destroyers of the Imperial era . History . The class name " Interdictor " was first proposed by Admiral Jimas Veltraa . When Veltraa was killed in the Mandalorian Wars , some proposed that the name of the class be changed to honor him , but this was overruled by the Supreme Chancellor . In 3963 BBY , construction on the " Interdictor " - class was approved . The original prototype " Interdictor " s were manufactured by Republic Sienar Systems . Like the " Inexpugnable " - class command ships , the " Interdictor " - class cruisers were built at Corellian shipyards , though many more would be constructed by the Star Forge to fuel the growing warfleet of the Sith Lord Darth Revan . The most notable " Interdictor " - class Cruiser was the " Leviathan " , a Galactic Republic warship that was said to be the only vessel in the class that came out of the shipyards in a space - worthy state . It was commanded by Admiral Saul Karath , who defected with the ship to join the Sith Lords Revan and Malak . The ship was duplicated in the Star Forge and produced by the hundreds . The " Leviathan " itself continued to serve as Karath ' s flagship up until his death . Malak , in the " Leviathan " , brought a fleet of " Interdictor " s to Taris and positioned them around that world in an attempt to stop the Jedi Knight Bastila Shan from escaping . Frustrated that the search for the missing Jedi was taking too long , he ordered his fleet to bombard Taris with their turbolasers , turning the Upper City into slag . Some time later , a number of " Interdictor " s participated in the Battle of Rakata Prime , which bore witness to the destruction of the Star Forge and the mass production of " Interdictor " - class ships and Sith fighter s . Despite that , many of the remaining " Interdictor " - class cruisers were later used to form the core of Darth Nihilus ' s Sith battlefleet and were seen in action at the Battle of Telos IV . Millennia later , the overall design principles survived in the Galactic Republic and later in the Galactic Empire , in the form of the Star Destroyer line of warships . Sienar , known under the Empire as Sienar Fleet Systems , went on to make the Immobilizer 418 cruiser , which was equipped with a superior form of gravity well projector . Behind the scenes . According to the " " , the " Interdictor " - class was built by Sienar Fleet Systems , a company which would not exist until the formation of the Galactic Empire . The company at the time of the Mandalorian Wars was still called Republic Sienar Systems . The 1998 PC program " " includes a glossary entry for the " " Interdictor " - class cruiser . " However , as this entry notes , the term is intended to apply to the Immobilizer 418 cruiser and should not be confused with the " Interdictor " - class cruiser of the " KotOR " series . " The Complete Star Wars Encyclopedia " mistakenly to an " Interdictor " type of ship , misusing an early name for the class that appeared in strategy guides and walkthroughs for " Knights of the Old Republic " .