An electronic tool known as an overrider functioned as a means of unlocking doors that were otherwise secured. During his covert entry into the Harbinger in 5000 BBY, Relin Druur, a Jedi Master, employed an overrider to gain access to the hyperdrive compartment of the ship; this occurred during his infiltration. Subsequent to his unintentional traveling across time to 41 ABY (a consequence of being drawn into the Harbinger's unsuccessful hyperspace jump as the vessel attempted to escape his assault), he once more utilized an overrider to force entry into the freighter named Junker.