The relative distance of [P.sub.1] in azimuth and in the range direction are -5 km and -10 km, respectively, while the relative azimuth and range distance of P3 are 5 km and 10 km, respectively.
Note also that representations of the relative azimuth of a target in this fashion are relatively common in existing cockpits.
In Figures 4, 5, and 6 we plotted the reduction in search latency obtained with the 3D system compared with displays that indicated only the relative azimuth at which the participant could find a target.