Takeoffs that could not be located:

• Sala, Tärnafältet — outside the curated takeoff dataset (29 flights)
• Åre, Tväråvalvet — outside the curated takeoff dataset (2 flights)
• Malmby flygfält - Strängnäs — outside the curated takeoff dataset (1 flight)
• Valle de Bravo, El Peñon — outside the curated takeoff dataset (36 flights)
• Gréolières, Mt. Cheiron — outside the curated takeoff dataset (1 flight)
• Col de Forclaz- Montmin — outside the curated takeoff dataset (1 flight)
• Chamonix — outside the curated takeoff dataset (5 flights)
• Chamonix, Plaine Joux — outside the curated takeoff dataset (1 flight)
• Enköping, Grillby — outside the curated takeoff dataset (3 flights)
• Funäsdalen — outside the curated takeoff dataset (1 flight)