| mil., logist. |
This level is defined along with the transit lines in order to facilitate the transport by aircraft of the operational traffic combat and support in the rear area, when they fly back into the forward area. The four levels used are: 1. Low TL, between the ground and level 110; 2. Medium TL, between levels 120 and 210; 3. High TL, between levels 220 and 340; 4. Very high TL, between levels 350 and 440. (FRA); That vertical displacement above low level air defense systems, expressed both as height and altitude, at which aircraft can cross the area. (FRA) |
