ANTHON (38) 22.09.2021

On 22 September 2021, as dated in the title, 2 residents in their garden in Anthon (Isère, 38) heard a high-pitched whistle in the late afternoon. Looking up, they saw a dark mass cross their field of view rapidly for about 1 second. The French narrative truncates the year to 202. Only 1 account was submitted. GEIPAN judges the evidential strength moderate: a single account, no photograph and a fleeting sighting. Under its criteria, evidential strength is the amount of information collected for an account that is considered reliable and objectively substantiated. The reported shape resembles some drone models; see the investigation report. The clearly heard high-pitched whistle strongly suggests proximity and closely matches drone noise. The brevity prevents detailed description, but the object flew along the edge of an area authorized for model aviation. The source notes that flying over private spaces was prohibited. The case is classified as B: probable observation of a drone.