Abstract: Each ring of a two ring transducer array provides signals that are bandpad filtered and hard-clipped. These signals are sampled in parallel at a predetermined frequency. The sampled signals are conducted to Adder circuits with appropriate delays being applied to predetermined signals. By sequentially changing the signals having a delay inserted and those applied directly to the Adder a 360.degree. azimuthal scan is provided in discrete angular steps. The sums of Adders of each ring are then combined. The system provides scans in the horizontal direction and at predetermined depression/elevation angles.