Sighting in Crozon, August 14, 2015

At about 5 p.m., a witness noticed a triangular shape in the sky moving slowly with a swinging motion. Through binoculars, they made out a royal-blue color as the object passed overhead. It stayed below the clouds and moved silently from north-northwest to south-southeast. Only one witness account was collected.

At Lanvéoc, a few kilometers away, the weather record showed a steady northwesterly wind and an overcast sky. The aviation weather report for Brest gave broken clouds at around 500 m, beneath a thick layer at about 1,000 m. The object's direction of travel therefore matched the wind, which points to something carried by the wind.

The shape could suggest a hot-air balloon, but the time of day was unusual for such flights, since balloonists prefer early morning or sunset, and the area is closed to overflight because of numerous military sites. In addition, the cloud ceiling was low and the object looked almost like a point to the naked eye, so it had to be small. With an apparent size of about a tenth of the Moon's at 500 m altitude, it would measure under 50 cm. A child's balloon released nearby, possibly a shiny mylar one, was far more likely. A festival was taking place that evening in Roscanvel, to the northwest, and fairground stands may have been set up. GEIPAN classified the case as B: a probable helium-filled child's balloon.