Type: Radar Evidence
Source: Belgian Air Force
Intercept Timeline and Data
Scramble: Two F-16s launched shortly after midnight on March 31, 1990, in response to reports from gendarmes and radar anomalies.
Radar Locks: Pilots achieved brief radar locks on the target multiple times. Official logs indicate the object exhibited extreme kinematic behavior, including accelerating from 150 to 970 knots (approx. 170–1,100 mph) and dropping from 9,000 to 5,000 feet in seconds.
Visual Confirmation: Despite tracking the object on airborne radar, the pilots established no visual contact with a physical craft during the engagement.
Official Findings: The Belgian Air Force report by Major P. Lambrechts documented the event as an unresolved anomaly, dismissing conventional explanations like balloons or weather phenomena, though later analysis suggested some radar artifacts may have been caused by atmospheric conditions or the fighters detecting each other.