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"I am aboard an Imperial I-class Star Destroyer. Built at the Kuat Drive Shipyards. It possesses many useful systems and capabilities."
―The Scourge[18]

The Imperial I-class Star Destroyer was a model of Imperial-class Star Destroyer in the service of the Imperial Navy. A wedge-shaped capital ship, it bristled with weapons emplacements, assault troops, boarding craft, and TIE fighter series starfighters. In the era of the Galactic Empire, its command bridge was staffed by the finest crewmen in the navy.

At first, Star Destroyers were deployed to sectors and systems caught in the aftermath of the Clone Wars, where they would crush any signs of sedition. During the Galactic Civil War the Destroyer's role changed to hunting down high value Rebel targets and bases. They fought in notable battles such as the Battle of Hoth and the Battle of Endor. The Imperial II-class Star Destroyer was a derivative of the Imperial I-class.



ISD blueprints

Technical drawing of an Imperial-class Star Destroyer

With a length of 1,600 meters, the wedge-shaped Imperial I-class Star Destroyer[1] was 445 meters longer[19] than its immediate predecessor, the Venator-class Star Destroyer, which had been developed for the Galactic Republic during the Clone Wars.[20] In keeping with the Empire's habit of favoring muted colors whenever possible,[21] the hull of the Imperial-class was painted in whitish gray,[1] while the Venator-class of the Clone Wars era had red markings denoting the Republic's diplomatic immunity.[19]

Crew requirements[]

Imperial I-class Star Destroyers had over 37,000 crew on board— 9,235 officers and 27,850 enlisted personnel. The complement of 9,700 stormtroopers added to a total of 46,785 crew and passengers.[1] With the bridge being located in the upper half of the ship, the officer's quarters were located right below it.[22] To complement its impressive crew size, every Imperial-class vessel carried consumables for 2 years,[14] with its liquid stores and holds for raw materials being located near its bow.[22] Amidships, crew barracks, gunnery crew quarters,[9] meeting rooms, training areas, and cell blocks were located in the vessels second 'step,' with four gradually upsloping smaller 'steps' eventually leading to the ships 'neck' which connected it to its upper bridge section, deflector shield generators, and communications array.[1] On the "side" of the ship existed the port lateral umbilical restocking vestibule.[9]

Like other Star Destroyers, a single Internal Affairs officer was stationed aboard the ship to scan the crew for signs of disloyalty and sedition, as well as interrogate any captured prisoners.[23] As most ships in the Navy, Rebaxan Columni MSE-6 series repair droids were employed to serve as messenger, repair and custodial assistants.[24]

Armament and shielding[]

"This is an Imperial Star Destroyer. All vital equipment is shielded. Even twenty bombs will do nothing."
―Prelate Verge[25]
Ghost knocks out tractor beam

The Ghost flies into the Relentless's tractor beam projectors.

The Imperial-class Star Destroyer bristled with weapons emplacements. 60 Taim & Bak XX-9 heavy turbolaser batteries, 60 Borstel NK-7 ion cannons, and ten Phylon Q7 tractor beam projectors dotted its whitish gray hull.[1] At the very front of the ship existed the forward pursuit tractor beam array. The ship also featured six dual heavy turbolaser turrets, two quad heavy turbolasers, three triple medium turbolasers, and two medium turbolasers. The Imperial I-class also featured two dual heavy ion cannon turrets that lined the dorsal superstructure flanking the command tower.[9] The turbolaser turrets of an ISD were hooked to large arrays of auxiliary power cells.[22] At both "ends" of the Star Destroyer existed an aft point defense laser cannon.[9]

By far the heaviest weapons on the ship were the six turbolaser turrets positioned alongside the two ion turrets. With a diameter of 50 meters, each turbolaser was capable of ripping through heavy armor and overloading shields. Although it was difficult to hit small, fast-moving craft, even a glancing blow would destroy them.[26]

On the underside of the very tip of the ISD was the navigational deflector generator.[9] It had heavy shielding[2] strong enough to easily withstand a collision with a GR-75 medium transport with no damage to the hull.[27] The Star Destroyer's targeting computers were produced by LeGrange.[28]



A heavy turbolaser battery on an Imperial I-class Star Destroyer

Within its vast belly hangar bays, an Imperial-class Star Destroyer typically carried an impressive complement of troops, consisting of seventy-two TIE fighter series starfighters,[10] eight Lambda-class T-4a shuttles, twenty AT-AT walkers, thirty AT-ST or AT-DP walkers, and fifteen Imperial Troop Transports. Despite its fighter complement, Imperial I-class vessels proved less effective against skilled rebel pilots than their Venator-class predecessors had been against droid starfighters.[1] They were nonetheless essential in the Imperial doctrine of planetary containment and fast infantry deployment, and the vessel was noted as one of the most resource-intensive ships in the Imperial Navy.[25]

Propulsion systems[]

Devastator Engines

The Ion Engines of an Imperial I-class Star Destroyer

Powering the Destroyer were seven main engine units,[8] including Cygnus Spaceworks Gemon-4 ion engines,[1] and could accelerate to speeds of up to 975 kph.[14] The ship however was not suited towards planetary atmospheres, in which full power was required to stay aloft. Any interruption in the power supply in atmosphere could be catastrophic to the vessel, despite all vital equipment being shielded.[25] The primary power source on board the ship was a solar ionization reactor large enough relative to the rest of the craft to protrude with a ventral bulb,[8] powering a massive cylindrical power generator located in sector 19-A on the ship's rear.[17]

Although well-armored, a direct hit from proton torpedoes in that area would cause a breach in the generator venting tunnel, causing the reactor to overload and explode within seven minutes. To prevent ship-wide catastrophe it was possible to jettison the reactor assembly, although this action would ultimately leave the ship running on auxiliary power.[17] Engines were controlled in a massive room filled with walkways and "Tulip" style Imperial work stations.[29] In order to jump to light-speed and enter hyperspace the Imperial-class was equipped with a Class 2 hyperdrive, while it was standard protocol to dump the ship's garbage before entering hyperspace in order to reduce the weight of the vessel.[1]

Bridge tower[]

Devastator Bridge

The bridge of the Imperial I-class Star Destroyer Devastator

A prominent feature of the Imperial-class was its bridge tower. Located atop the tower were twin deflector shield generator globes and a tractor beam targeting array.[8] The command bridge itself featured two elongated pits set below floor level, whose walls were lined with monitors and control panels. In addition, six more duty station consoles were mounted freely in each pit. The superiors officers stood on a walkway surrounding the pits at the normal deck height. All the consoles were aligned perpendicular to the walkway. A small room behind the main bridge existed separated by a single blast door, which had access to advanced communications equipment and a holographic imaging table.[30] This arrangement was considered beneficial for denoting rank hierarchy within the ship.[24]


Imperial fleet above Lothal-Sw Rebels S3-Iron Squadron

Grand Admiral Thrawn's Seventh Fleet

The Imperial-class Star Destroyers were the technological successors of the Venator-class Jedi cruisers used by the naval forces of the Galactic Republic during the Clone Wars. After the Republic was turned into the Empire at the end of the Clone Wars, the self-anointed Galactic Emperor Sheev Palpatine decreed a massive military buildup. To meet interstellar defense needs, the great shipyards of the galaxy were fired up during the Clone Wars and remained lit well into the Age of the Empire. The enormous construction facilities at Kuat, Corellia, Ringo Vinda, Fondor, and elsewhere were converted from civilian graving docks into military starports capable of churning out Imperial-class Star Destroyers.[9] Building upon the strengths of the Jedi cruisers, the bigger Imperial-class vessels became one of the most instantly recognizable symbols of the Imperial might, and were often titled intimidating names such as Lawbringer, Relentless, and Devastator.[20]

Lothal under siege

Three Imperial I-class Star Destroyers over Lothal

Initially, the new Star Destroyers were deployed to sectors and systems that had once been beyond the reach of Republic law, where they would subjugate them and crush any signs of resistance or rebellion. Imperial Star Destroyers became symbols of this new order. Citizens weary of chaos and war cheered the sight of these giant dagger-shaped warships, while pirates and enslavers quailed at the thought of confronting them. But a few citizens wondered if the imposition of Imperial law was worth the freedoms lost.[20]

Easily becoming the most recognizable symbol of Imperial power, the Imperial-class further demonstrated its tactical versatility by protecting galactic commerce and bolstering Imperial-backed governments. Many admirals, Grand Moffs, ISB agents and senior Imperial commanders utilized these ships as their personal command ship, with the ship's officer often being as intimidating as the ship itself—whose shadow alone could bring results.[1] At the peak of the Empire, over 25,000 Imperial Star Destroyers were in existence[31] with 24 assigned to each of the 1,024 regional sectors to form independent Sector Groups.[7] The Empire's primary source of Star Destroyers and Destroyer-equipped shipyards was located at the industrial manufacturing center of Kuat. Ultimately, these giant craft became the backbone of the Imperial Navy, hunting down Rebel task forces, blockading undisciplined worlds and serving as launch bases for planetary assaults.[20]

Eventually, the Imperial I-class Star Destroyer would be replaced by the Imperial II-class Star Destroyer. The Devastator was the last of the Imperial I-class Star Destroyers to lumber out of the Kuat Drive Yards before the facility began production on the Imperial II-class,[9] although it was later upgraded to compete with these more advanced warships.[32]

The Imperial-class would ultimately see service in the First Order's Navy thirty years after the Battle of Endor, and would be regarded as a highly respected ship, with many of its design flaws rectified with the construction of the Resurgent-class Star Destroyer, a newer, more powerful vessel based on the Old Empire's dreaded warships.[33] 35 years after the Battle of Yavin, the Sith Eternal used Xyston-class Star Destroyers. These Star Destroyers were based directly on the design of the Imperial-I-class Star Destroyer, with the primary exception being that the Xyston-class was armed with a planet-killing weapon.[34]

Behind the scenes[]

There are some inconsistencies over the armament of the Imperial I-class Star Destroyer. Starships and Speeders states that the Imperial I-class Star Destroyer possessed both light and heavy turbolaser batteries, and two different types of ion cannons.[2] However, Star Wars: Rogue One: The Ultimate Visual Guide does not support different ion cannons or light and heavy turbolasers,[9] and Ultimate Star Wars, New Edition[1] and Star Wars: Dawn of Rebellion: The Visual Guide[3] state that it had 60 Taim & Bak XX-9 heavy turbolaser batteries and 60 Borstel NK-7 ion cannons.[1] This article assumes Starships and Speeders is incorrect.


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Non-canon appearances[]


Notes and references[]

  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26 Ultimate Star Wars
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 Starships and Speeders
  3. 3.0 3.1 3.2 3.3 Star Wars: Dawn of Rebellion: The Visual Guide
  4. Star Wars Super Graphic: A Visual Guide to a Galaxy Far, Far Away
  5. Star Wars Rebels: Head to Head
  6. 6.0 6.1 6.2 ToppsDigitalLogo Star Wars: Card Trader (Card: Star Destroyer - Blueprints)
  7. 7.0 7.1 7.2 7.3 7.4 7.5 Build the Millennium Falcon Star Wars: Build the Millennium Falcon 20 (Starship Fact File: Imperial I-class Star Destroyer)
  8. 8.0 8.1 8.2 8.3 Droids in Distress book
  9. 9.00 9.01 9.02 9.03 9.04 9.05 9.06 9.07 9.08 9.09 9.10 9.11 9.12 9.13 9.14 Star Wars: Rogue One: The Ultimate Visual Guide
  10. 10.0 10.1 10.2 10.3 10.4 Star Wars: TIE Fighter Deluxe Book and Model Set
  11. 11.0 11.1 AhsokaS1 Logo Ahsoka — "Part Six: Far, Far Away"
  12. 12.0 12.1 Rebels-mini-logo Star Wars Rebels — "Warhead"
  13. Star Wars (2015) 23
  14. 14.0 14.1 14.2 Star Wars: Absolutely Everything You Need to Know
  15. Star Wars: Timelines
  16. "Part V" features the Devastator's first chronological appearance. Star Wars: Timelines dates the events of Obi-Wan Kenobi to 9 BBY. Therefore, the events of "Part V" must be set in 9 BBY. As such, the Devastator must have been commissioned in or before that year. As Star Wars: Rogue One: The Ultimate Visual Guide states the the Devastator was the last Imperial I to be produced, the line must have been retired by that year.
  17. 17.0 17.1 17.2 17.3 Star Wars (2015) 22
  18. 18.0 18.1 Dark Droids 1
  19. 19.0 19.1 StarWars-DatabankII Republic Attack Cruiser in the Databank (backup link)
  20. 20.0 20.1 20.2 20.3 StarWars-DatabankII Imperial Star Destroyer in the Databank (backup link)
  21. A New Hero
  22. 22.0 22.1 22.2 Rey's Survival Guide
  23. Lost Stars
  24. 24.0 24.1 Star Wars: The Force Awakens: The Visual Dictionary
  25. 25.0 25.1 25.2 Battlefront: Twilight Company
  26. Star Wars Complete Vehicles, New Edition
  27. Rogue One: A Star Wars Story
  28. AltayaCite "Starships of the Empire and the Rebellion" — Star Wars Encyclopedia
  29. Rebels-mini-logo Star Wars Rebels — "Fire Across the Galaxy"
  30. Star Wars Rebels: Spark of Rebellion
  31. Star Wars: Uprising
  32. SWInsider "Blade Squadron" — Star Wars Insider 149150
  33. Before the Awakening
  34. Star Wars: The Rise of Skywalker: The Visual Dictionary