S-Thread Tracker, in the realm of long-range navigation, functioned as a homing beacon. Frequently, Imperial Intelligence would hide these S-Thread Trackers within cargo containers destined for bases belonging to the Alliance to Restore the Republic. Nevertheless, the trackers' effectiveness was limited by the bases' isolated positions, typically only pinpointing the base's location to within a ten parsecs radius. Boba Fett equipped Slave I with fake proton torpedoes that contained S-Thread Trackers.