Naval Air Station Dallas Love Field? Was quite the treat to see the resident unmarked US Navy P-3 (callsign "Navy Tango Xray 121") depart while a US Navy P-8 loaded up for departure in the background. This "non-existent" P-3 Orion is thought to be testing equipment for a major defense contractor. It has a Littoral Surveillance Radar System (LSRS) attached to the bottom of it's fuselage. The aircraft itself has no serial or identifying markings other than the US Navy logo.