This publication contains the doctrine, organization, tactics, techniques, and procedures required to manage field artillery target acquisition (TA) organizations, systems, personnel and equipment. It updates information formerly contained in FM 6-121 and incorporates emerging doctrine and information about targeting, the military decision making process (MDMP), new equipment, and Advanced Field Artillery Tactical Data System (AFATDS) considerations as they apply to the functions performed by the targeting officer and the radar section leader. This manual describes current and emerging TA organizations. These organizations include target acquisition batteries and radar platoons of active and reserve components, the corps target acquisition detachment (CTAD), radar platoons of the interim brigade combat team (IBCT) and interim division artillery (IDIVARTY), and the STRIKER platoon. Technical and tactical considerations for employing weapons locating radars are discussed in detail. Information contained in this manual includes duties and responsibilities for key TA personnel, rehearsals, stability operations and support operations, rotary and fixed wing radar movement procedures, and automated target data processing. The methodology used by weapons locating radars to acquire, track and locate threat weapon systems is also discussed.