According to the so-called Executive Summary (admittedly a dubious source) a pilot (identified as Kurth)It's strange Fravor said the radar was clear, while Kurth saw him and Dietrich on his radar.
gained radar contact of what he believed to be two F/A-18Fs that were approaching the AAV from the west at low altitude (500-5000 feet). There was no other traffic on the radar.