The Immobilizer 418 cruiser, also known as the Interdictor-class heavy cruiser, Interdictor-class medium frigate, or simply the Interdictor, was a 600-meter-long cruiser built on the standard Vindicator-class heavy cruiser hull.

Equipped with gravity well projectors designed to pull ships from hyperspace and/or prevent them making the jump to lightspeed, the Interdictor became a valuable addition to the Imperial Navy.

Interdictor cruisers, like their Vindicator-class cousins, had the appearance of small Star Destroyers. However, their lines were broken by four large globes housing gravity well projectors.

The Interdictor cruisers were first manufactured by Sienar Fleet Systems two years before the Battle of Yavin.

One example, the Rook served as base of operations for Rear Admiral Genarus Thorn and his Outer Rim patrol fleet.

Technical specifications
Length
600 meters
Width
300 meters
Height/depth
100 meters

Armament
SFS G7-x gravity well projectors (4)
Taim & Bak GX-7 quad laser cannons (20)

Complement
TIE Series starfighters (24)
Shuttles (4)
Crew
Crew (2,807)
Gunners (24)
Officers (427)
Enlisted (2,380)
Minimum crew
1,500
Passengers
80 (troops)
Cargo capacity
5,500 metric tons