Hughes AN/TPQ-36 Firefinder Weapon Locating System is a mobile radar system developed by Hughes Aircraft Company and manufactured by Northrop Grumman and ThalesRaytheonSystems. The system is a "weapon-locating radar", designed to detect and track incoming artillery and rocket fire to determine the point of origin for counterbattery fire. It is currently in service at brigade and higher levels in the United States Army, United States Marine Corps and Australian Army. The radar is typically trailer mounted and towed by a Humvee.