Black Triangle
- First reported
- 1980-82 (Hudson Valley boomerang/triangle sightings begin; Rendlesham Forest witnesses that December also described a dark, roughly triangular craft)
- Peak decade
- 1980s-1990s
Composite silhouette from witness reports
Profile
A large, flat, matte-black or dark-grey triangular or delta-wing craft, typically reported with a bright white or colored light at each corner and sometimes a dim, pulsing central light — moving with total silence at low altitude and low speed, or occasionally hanging motionless for minutes at a time before departing without a sound. Size estimates run enormous: witnesses across the 1989-90 Belgian wave and the earlier Hudson Valley sightings routinely described a triangle the length of a football field or larger, low enough to make its silence itself the most unsettling detail — something that size should not be able to hover, let alone hover quietly. Military and police witnesses feature heavily in the best triangle reports, including Belgian F-16 pilots who locked radar on a triangular target that reportedly dropped altitude by thousands of feet in seconds without measurable acceleration signatures consistent with any known aircraft. A persistent internet and insider-testimony lore holds that some or all black-triangle reports are sightings of a real but secret U.S. antigravity program nicknamed the 'TR-3B' — a claim that remains entirely speculative, sourced to anonymous insiders and a single disputed magazine article rather than any declassified document, and is flagged here as folklore rather than established fact. The shape's silent, slow, low-altitude profile has made it one of the most consistently reported forms since the 1980s, cutting across the U.S., Belgium, and the UK alike.
Skeptical reading
The leading mundane explanation for most triangle reports is a formation of ultralight aircraft or drones flying in a fixed pattern with wingtip lights, which the eye and brain merge into one solid dark shape against a night sky — an illusion demonstrated to reproduce classic 'black triangle' witness sketches closely. Some cases plausibly involve genuine classified military aircraft (blended-wing or stealth designs) whose silhouette and unusual quietness for their size were simply unfamiliar to 1980s civilian witnesses. The TR-3B 'antigravity black triangle' claim specifically has no declassified or physical evidentiary support and is treated by most serious researchers, including Marler, as internet-era mythology layered on top of a genuine and much older report pattern.