What does it mean when the ATC is talking about Flightlevels like FL340 or FL190?
– They are talking about altitude. FL340 is 34,000 feet, so just add “00” at the end. The ATC start talking in Flight Levels when you are above the Transition Altitude, which is a safe altitude above any obstacles within some distance of the operation area. The TA varies from country to country and sometimes even in a country. For north america, it is 18,000 feet.
