Additional equipment includes an autopilot, communication and satcom radios, APN-241 precision ground mapping radar
integration, navigation sensors and surveillance systems including a Traffic Collision Avoidance System (TCAS), Terrain Awareness and Warning System (TAWS) and digital map.
The GR4 can operate in all weather conditions, using Terrain Following Radar (TFR) and Ground Mapping Radar
(GMR) to guide the aircraft and identify the target.
Air Force combat controllers as a navigational aid to conduct precise air drops without the use of other external aids, such as global positioning systems (GPS) or ground mapping radar
The simulator, like the real aircraft, has terrain following/terrain avoidance and ground mapping radar
The GeoSAR interferometric mapping radars
installed on the Gulfstream consists of an X-Band and UHF (P) band IFSAR system.