AnomalyOn September 2, 2013 at 12:45 p.m., a witness is intrigued by the silent movement of an object in the sky. It makes a few beginning turns and appears round and oblong in shape depending on the viewing angle during these turns. Given the elements available in the investigation report, namely the presence nearby of an aerodrome offering gyrocopter flights, the absence of non-mandatory lighting on gyrocopters, the compatible shape and color, and the movements and speeds largely compatible, we can conclude that the UAP observed by the witness is probably a gyrocopter in a climbing phase. This testimony is of average consistency: fairly imprecise with numerous inaccuracies, coming from a single witness and without photos. The observation is not very strange because it could be a fairly ordinary object. This case is classified as "B" as a probable observation of a gyrocopter.
Yonne, France · 2013-09-02 · from the GEIPAN archive
An account in Yonne, France
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This is an official case file of GEIPAN, the French space agency's unidentified aerospace phenomena office, machine translated from French. The original text and the full investigation file are at geipan.fr. We reproduce it with thanks and remove anything on request.