lennuraja minimaalne pikkus, mis on vajalik startimiseks maksimaalse lubatud/sertifitseeritud stardimassi, merepinnakõrguse, standardsete atmosfääritingimuste, tuulevaikuse ja lennuraja nullkalde korr, the minimum field length required for take-off at maximum certificated take-off mass, sea level, standard atmospheric conditions, still air and zero runway slope, as shown in the appropriate aeroplane