Imperial Sleeper

An Imperial Sleeper was a type of tracking program used during the war between the Rebel Alliance and the Galactic Empire. The program could be installed into a starship's systems and was tied to the ship's clock. Triggered by the turning of the clock at a set time, the program would become active and report the ship's current course and position to the nearest Imperial world in a coded burst.

In 0 ABY, Alliance agents Luke Skywalker and Nakari Kelen were on a mission to rescue the slicer Drusil Bephorin. While preparing to leave the planet Kupoh, Bephorin found an Imperial Sleeper that had been installed into Kelen's ship and removed it before they continued their escape from Imperial pursuit.

Text and facts from the “Imperial Sleeper” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.