I tested the vertical scan limits with a simple mission (attached). I placed a fighter at a horizontal distance of 30km and 5,2km above me which results into a vertical angle of 10 degrees (30km*tan(10°)~5,2-5,3km). My radar could find the fighter above me (see picture) although hes outside of my 4-bar search limitation from -6 to 6 degrees (12 degrees in total).
So are you sure that the 4 bar search includes a cone of 12° and not more, like 24°? M2k-RadarTest.miz