High Quality Content by WIKIPEDIA articles! A counter-battery radar detects artillery projectiles fired by one or more guns, howitzers, mortars and rocket launchers and from their trajectories locates the position on the ground of the weapon that fired it. Alternatively, or in addition, it may determine where the projectile will land. The normal purpose of a counter-battery radar is to locate hostile batteries up to about 50 km away depending on the radar`s capabilities.