Soesterberg Air Base UFO Sightings (1979)

Background

Soesterberg Air Base is a Royal Netherlands Air Force installation in the central Netherlands. Its American part, Camp New Amsterdam, hosted US squadrons flying fighter jets during the Cold War, a detail that later commentators have used both to suggest classified aircraft and to explain the sightings away. A Dutch skeptic-leaning article notes that the US units may have been using laser equipment at the time.

The case is one of the few Dutch UFO reports with multiple military witnesses and an official response, and it has been revisited in Dutch media for decades. It is a useful test case because the witness accounts are unusually consistent on the core facts, while the surrounding details (the number of witnesses, the shape, the explanation) shift from source to source.

The sightings

According to UFO Insight, at about 5:45 a.m. on 3 February 1979, twelve military guards posted at five locations around the base (labelled Posts A to E) saw a large object pass overhead. They described a triangular craft with three white lights and a single red, beam-like light underneath, flying roughly 500 to 600 feet up. It moved silently and was visible for about five minutes. The base commander, Van Vliet, is quoted as saying the object “produced no sound at all.”

Investigators later reconstructed the event with ten of the twelve witnesses and concluded there had been two flyovers, possibly by one object or two. Some witnesses later recalled connecting structures between the lights, which suggests the shape may have been rectangular or kite-like rather than purely triangular. A second event followed on 2 March 1979, over Camp New Amsterdam.

Other accounts are looser. A 2023 documentary by Bram Roza describes at least twelve soldiers and a “massive black triangular UFO,” but that material is promotional. UFO Insight also repeats claims of a radio blackout and a red beam aimed at a nuclear bunker, and it flags these as unsourced and possibly embellished.

Investigation and official response

UFO groups approached the Air Force in April 1979. The military's public explanation, as reported by UFO Insight, was a “mirage”: car headlights reflected off a layer of air. Witnesses and investigators rejected that account, and UFO Insight reports that the Dutch government questioned the military after the March event.

I found no published Ministry of Defence report on the 1979 sightings. A NOS article quoting Alex Griffioen of the Dutch UFO reporting point says that Dutch reports are not examined in secret by Defensie and that no research into them is carried out in the Netherlands. The same piece describes the late-1970s Soesterberg sighting as one that was never explained. A 2012 local follow-up in the Soester Courant carried the headline “UFO-raadsel in Soesterberg blijft” (the Soesterberg UFO mystery remains).

Explanations and assessment

The explanations on the table are the military’s headlight-reflection account, the US laser-test theory, and the more speculative options UFO Insight lists without endorsing: an undisclosed American or Soviet aircraft, an extraterrestrial craft, or a reconnaissance flight over nuclear weapons storage.

The most pointed skeptical voice comes from Jan van Esseveld, a former Soesterberg radar operator. He told a Dutch article that UFO reports are nonsense and that any solid object would have shown up on radar, “even a small bird.” That argument is strong only if the base radar was working and recording on the night, and none of the sources read here reports radar returns or logs for February 1979, so it remains an argument rather than a documented finding. Coen Vermeeren of TU Delft has said a UFO sighting above Soesterberg is very likely and that evidence is being withheld; the chair of Stichting Skepsis wrote to the TU Delft rector questioning the scientific quality of Vermeeren’s work.

On balance, the case is contested. The core account rests on a group of trained military witnesses, and the military’s own explanation was disputed by them. Against that, the witness count and object description vary between sources, the official file is not public, and most detailed accounts come from enthusiast or promotional material. It is best read as an unresolved, documented sighting rather than evidence of anything specific.