- "Kuat Shipyard to all Imperial units! We are under siege by significant Rebel forces! All ships in the area, respond! Emergency Code Zero!"
- ―The Kuat Shipyard Communications Officer activing Emergency Code Zero
The code was activated at the First Battle of Kuat, when ships of the Rebellion attacked a shipyard over the planet. The activation of the code resulted in the Star Destroyer Tyranny being diverted from its post at Fresia, where it had been stationed by Darth Vader himself.