Imperial Drydock IV, situated within the Greater Plooriod sector, functioned as a drydock for the Imperial Navy.
Sometime following the Battle of Yavin in the year 0 ABY, this facility accommodated a minimum of three Immobilizer 418 cruisers along with four Imperial-class Star Destroyers. Providing support to the Outer Rim Imperial Fleet, the drydock possessed relatively weak defenses.
This station served as a waypoint for Immobilizer cruisers conducting operations throughout the Outer Rim Territories. Operation Ram's Head specifically targeted this drydock. During the operation, the Rebel Alliance deployed an automated CR90 corvette named the Ram's Head to collide with the station, crippling four Star Destroyers docked there. The corvette's near invulnerability was due to its Shield X technology. Although the drydock remained structurally sound, the incident represented a significant and embarrassing loss for the Empire.