On the left side of the Battery Control Van are located the Computer Power Panel and the Computer Control Panel. The Computer Operator is performing Computer static test at this panel. Located on the upper section of this panel are Parallax knobs used to electrically place or position the distance of the Missile Tracking Radar,( X, Y, & H coordinates) and the center of the Launching Area at the same location as the (base piece) in the Nike system, the Target Tracking Radar. Three meters, partially hidden by the operator's hands, are position difference meters in X, Y & H coordinates and are observed when both the Target & Missile Tracking Radar's are used to track a single aircraft.