Abstract: Electronic priority map storage and control for prioritizing radar detections for fire control or monitoring purposes relative to batteries of mortars or artillery or other projectile sources. Use of a priority map to increase probability of location of at least one weapon in each battery is desired. The theory is based upon the premise that all guns in a battery are firing at the same target and, consequently, all projectiles from a battery will be detected within a relatively small area. By distributing track initiations over a large area of detection, the probability of tracking projectiles from all batteries is increased. The use of the priority map to accomplish this function is made in order to save time in a general purpose data processing computer employed additionally for other functions. A group of priority map cells are combined to form a track initiation cell. That is, a second map is formed with coarser granularity for the purpose of controlling the priority of track initiations.