Tří Sekery Radar Incident — Czechoslovak Military Scramble

On the evening of May 5, 1992, military radar operators at installations in western Bohemia detected an unidentified flying object approaching Czechoslovak airspace from German territory. The object was first registered on radar while still over Germany, moving at approximately 200 kilometers per hour, before it crossed the international border near the village of Tří Sekery in the Cheb district — a strategically significant zone that had sat on the front line of the Iron Curtain for four decades. The object proceeded eastward, holding a steady course toward the village of Hvozd, and remained tracked on multiple radar systems for approximately 45 minutes.

What made the incident immediately anomalous to operators was the nature of the radar return: the object was clearly and consistently visible across several different radar systems simultaneously, yet it produced no transponder response and matched no registered civilian or military flight plan in the airspace. The radar picture showed the contact maintaining a relatively low altitude of approximately 1,500 meters above the ground — beneath most commercial air corridors but well within the detection envelope of ground-based military radar.

The Czechoslovak military command responded by scrambling aircraft from two separate installations. An Aero L-39 Albatros jet trainer-interceptor from the then-operational Žatec air base was the first to be launched, followed by a Mil Mi-24 helicopter dispatched from the Plzeň-Líně air base. Both aircraft arrived in the area of the radar contact under favorable weather conditions. Despite the clear skies and the continued presence of the object on radar — at one point ground radar had one aircraft positioned above the contact and the other below — neither crew could establish any visual contact with an object. Pilots reported seeing nothing in the airspace where the radar was indicating the contact's position.

Ground observers in the area of Tří Sekery and along the projected flight path also reported sightings of an unusual aerial object during this period. Those ground witnesses described the craft as a silver or silvery cylindrical form without wings — a shape consistent with what ufologists classify as a cigar-type object. The object left no acoustic signature that would match a conventional aircraft traveling at 200 km/h at 1,500 meters, a speed and altitude combination that would typically produce clearly audible engine noise.

After tracking the unidentified contact eastward across Bohemia, radar operators watched as the object altered course toward Chomutov. Then, abruptly, the radar return disappeared near the town of Jirkov. Witnesses and analysts later described the disappearance as the object moving upward and out of radar coverage within a single second — a termination of the track inconsistent with the object flying out of range or landing. No crash, debris field, or landing site was subsequently identified in the area.

The Cheb district in western Bohemia where the incident began had a particular strategic significance during the Cold War era. The region's proximity to the West German border made it one of the most heavily militarized zones in the Warsaw Pact's defensive posture. The Czechoslovak Air Defence Forces maintained multiple radar sites in this corridor throughout the Cold War, and Žatec — the base that launched the responding L-39 Albatros — was historically one of the most important airfields in the country, having served as a major installation since World War II and throughout the Soviet-aligned period. When the object was detected in May 1992, Czechoslovakia was less than two years past the Velvet Revolution of November 1989 and in the final months before the scheduled dissolution of the federal state into the Czech Republic and Slovakia on January 1, 1993. The military infrastructure — radar networks, air bases, and command structures — inherited from the Communist era remained largely intact and operational.

The incident was investigated and catalogued by Projekt Záře (Project Glow), a Czech civilian UFO research organization founded by ufologist Vladimír Šiška in March 1992 — the same year as the incident. Over three decades of operation, Projekt Záře catalogued approximately 4,811 cases across the Czech Republic, explaining roughly 96 percent through conventional means. The Tří Sekery incident remained in the unresolved portion of that archive. Czech media outlets, including Seznam Zprávy, subsequently reported on the case as part of broader coverage of documented Czechoslovak military encounters with unidentified aerial objects. No official Czechoslovak or Czech military report has been publicly released explaining the contact, and no aviation authority has identified a registered aircraft that matches the radar track of May 5, 1992.