- "Sir, the odds of surviving a direct assault on an Imperial Star Destroyer—"
- — C-3PO before being interrupted by Leia Organa
The Imperial-class Star Destroyer Mark II, also known as the "ImpStar Deuce", is a Star Destroyer model that was derived from the Imperial-class Star Destroyer. The class began with the prototype Imperial II known as Empire, commanded by Admiral Feyet Kiez. The first operational ships of this class began to appear in service several months after the Battle of Yavin.
Several differences exist between the Mark I and Mark II, including the replacement of the tractor beam targeting array between the command tower's sensor globes with a communications tower. The Mark II is also built with a heavily reinforced hull, stronger deflector shields, faster hyperdrive, and greater firepower than the original Mark I class.
Other new features include two parallel "claws" for grappling smaller starships placed in the ventral secondary docking bay, an option for gunners to eject from their station if it is about to be destroyed, and the transparisteel viewports on the main bridge being able to resist the impact of a concussion missile.
The two ships are structurally very similar, however Mark I's and Mark II's can easily be distinguished via the appearance of the engines: original Mark I's have small triple baffles surrounding the main engines, whereas Mark II's have ring baffles.
Several Mark I's have been upgraded into Mark II's since their introduction.