- Ultralight aircraft (ULM).
- Unmanned aerial vehicles (UAV).
- Aircraft (including Stealth).
- Laser projections or holograms.
- Mirages or other meteorological phenomena.
The Belgian UFO wave peaked with the events of the night of 30/31 March 1990. On that night unknown objects were tracked on radar, photographed, and were sighted by an estimated 13,500 people on the ground - 2,600 of whom filed written statements describing in detail what they had seen. Following the incident the Belgian air force released a report detailing the events of that night.
At around 23:00 on 30 March the supervisor for the Control Reporting Center (CRC) at Glons received reports that three unusual lights were seen moving towards Thorembais-Gembloux which lies to the South-East of Brussels. The lights were reported to be brighter than stars, changing color between red, green and yellow, and appeared to be fixed at the vertices of an equilateral triangle. At this point Glons CRC requested the Wavre gendarmerie send a patrol to confirm the sighting.
Approximately 10 minutes later a second set of lights was sighted moving towards the first triangle. By around 23:30 the Wavre gendarmerie had confirmed the initial sightings and Glons CRC had been able to observe the phenomenon on radar. During this time the second set of lights, after some erratic manoeuvres, had also formed themselves into a smaller triangle. After tracking the targets and after receiving a second radar confirmation from the Traffic Center Control at Semmerzake, Glons CRC gave the order to scramble two F-16 fighters from Beauvechain Air Base shortly before midnight. Throughout this time the phenomenon was still clearly visible from the ground, with witnesses describing the whole formation as maintaining their relative positions while moving slowly across the sky. Witnesses also reported two dimmer lights towards the municipality of Eghezee displaying similar erratic movements to the second set of lights.
Over the next hour the two scrambled F-16s attempted nine separate interceptions of the targets. On three occasions they managed to obtain a radar lock for a few seconds but each time the targets changed position and speed so rapidly that the lock was broken. During the first radar lock, the target accelerated from 150mph to over 1,100mph while changing altitude from 9,000ft to 5,000ft, then up to 11,000ft before descending to almost ground level – the first descent of more than 3,000 feet taking less than two seconds. Similar manoeuvres were observed during both subsequent radar locks. On no occasion were the F-16 pilots able to make visual contact with the targets and at no point, despite the speeds involved, was there any indication of a sonic boom.
During this time, ground witnesses broadly corroborate the information obtained by radar. They described seeing the smaller triangle completely disappear from sight at one point, while the larger triangle moved upwards very rapidly as the F-16s flew past. After 00:30 radar contact became much more sporadic and the final confirmed lock took place at 00:40. This final lock was once again broken by an acceleration from around 100mph to 700mph after which the radar of the F-16s and those at Glons and Semmerzake all lost contact. Following several further unconfirmed contacts the F-16s eventually returned to base shortly after 01:00.
The final details of the sighting were provided by the members of the Wavre gendarmerie who had been sent to confirm the original report. They describe four lights now being arranged in a square formation, all making short jerky movements, before gradually losing their luminosity and disappearing in four separate directions at around 01:30.
On 5 November 1990, RAF Tornado aircraft flying over the North Sea were casually overtaken by a UFO. The pilot's report stated "UFO appeared in our right hand side ... we were travelling at Mach point 8. It went into our 12 o'clock and accelerated away. Another 2 Tornados saw it". Further details were reported in the National Enquirer, March 12, 1991, page 50: "Airline pilot in chilling brush with giant UFO", by Fleur Brenham. Has photo of "Veteran pilot, Capt. Mike D'Alton. He's convinced it came from outer space."
"A massive glowing UFO stunned a veteran British Airways pilot and his crew when it shot in front of their Boeing 737 on a night flight from Rome to London - then zoomed out of sight at fantastic speed" The newspaper quoted the pilot: "This thing was not of this world," declared Capt. Mike D'Alton. "In all my 23 years of flying I've never seen a craft anything like this."
"Capt. D'Alton says he's convinced the mysterious craft came from outer space because: It was traveling at tremendous speed, but caused no sonic boom. . . it had a bizarre shape like nothing he'd ever set eyes on . . . and it made a sharp turn while flying at high speeds - an impossible maneuver that would rip any man-made aircraft to bits. Just as incredible, when Capt. D'Alton checked with area air traffic controllers, they hadn't detected a thing! 'There was nothing on the radar screens of any of the control towers it was flying over,' he said."
According to the article, "The encounter began at 6:03 p.m. last November 5 as Capt. D'Alton's airliner was flying over Genoa, Italy. 'The rest of the crew saw it, too,' he said. 'What we saw was one large, fairly bright light. Ahead of it was a formation of three fainter lights in a triangle. Another faint light was behind the large light and was slightly lower.' D'Alton continued: "The craft was flying level, going much too fast to be a man-made aircraft. I've flown all over the world, and I know this thing wasn't a shooting star, space debris or the northern lights."
Said Bob Parkhouse, the flight's chief steward: "The UFO was moving from left to right across the horizon. It was a sight I'd never seen before!"
"The crew watched the craft for two minutes, said Capt. D'Alton. 'Then it took a lightning-fast right-angle turn and zoomed out of sight.' Other pilots, including a Lufthansa German Airlines captain, reported a UFO sighting around the same time. Capt D'Alton said. 'It had to be something from another planet - because it was definitely not man-made!'