lennutasand, milleni või millel on ATC-üksus lubanud lennata, the flight level to or at which a flight has currently been cleared by ATC, the flight level at or to which an aircraft is authorised to proceed under conditions specified by an ATC unit

lennutasand, milleni või millel on ATC-üksus lubanud lennata, the flight level to or at which a flight has currently been cleared by ATC, the flight level at or to which an aircraft is authorised to proceed under conditions specified by an ATC unit