Theory: "In accordance with ICAO Annex 10 - Aeronautical Telecommunications, air/ground communications should be conducted in the language normally used by the ground station. This will in most cases be the language of the nation responsible for the station. ICAO recommends that in cases where English is not the language of the ground station the English language should be available on request from any aircraft as a universal medium for radiotelephony communication.". .. .Practice: French ATCOS speak English, but bloke with radio in shack at Poubelle-la-Petite may not, and incoming bloke in Robin about to fly up your wazzoo certainly doesn't.. .. .M le Blaireau: vous avez raison, mais nous avons triché et remplacé les instruments avec lesquelles qu'indique les kts et pas les kms. Mais nous bien rappelons qu'est un avion Francais parce'que les ingénieurs sont toujours au déjeuner et ils n'ont pas avait fait l'annuelle. Bof!