Radar area correlator
The highly accurate terminal guidance technique used by the Pershing II RV was radar area correlation, using a Goodyear Aerospace active radar guidance system. This technique compared live radar video return to prestored reference scenes of the target area and determined RV position errors with respect to its trajectory and target location. These position errors were used to update the inertial guidance system, which in turn sent commands to the vane control system to guide the RV to the targe

The G&CC contained an inertial guidance system that could guide the missile on-target in a pure ballistic mode as a backup. The primary guidance was the Goodyear Aerospace active radar guidance system. Using radar maps of the target area, the missile had an accuracy of 30 metres (100 ft) circular error probable.