A Dedicated Energy Receptor, or DER, represented a specific kind of sensor that was nearly exclusively used on military starships. Examples included the Galactic Republic's Aggressive ReConnaissance-170 starfighter and the Galactic Empire's IGV-55 surveillance vessels. On these vessels, it functioned as the main passive sensor within their sensor arrays. DERs were capable of identifying any electromagnetic emission within their operational radius, like comlink signals, infrared radiation, and laser beams. Due to their military application, installing a DER on a non-military vessel was typically against the law.