Since 1981 alot of shortcomings have been over come in terms of technology generally speaking. http://www.airforce-technology.com/projects/s100b_argus/ "The Erieye radar provides 360° coverage with optimum performance of the radar over the 150° azimuthal sectors on each side of the aircraft. The radar can detect fighter aircraft at a range of 350km in a dense hostile electronic warfare environment, in heavy radar clutter and at low target altitudes. The radar has a sea surveillance mode. Please kindly search for "Erieye 360 coverage" (no quotes) and you ll find enough links "