| has gloss | eng: Nap-of-the-earth (abbreviated NOE) is very low-level type of flight course used to avoid detection and attack by an enemy when in a high-threat environment. flying under wires (such as electricity cables) rather than over them. Attack helicopters can hide behind trees or buildings, popping up just enough to use their (rotor mast-mounted) radar or other sensors and then minimally exposing themselves to launch weapons. Escape can then be made by further NOE flying. The altitude is different dependent on the area of operations, and is related to understory canopy layer (<15m/50ft) or low building, tree canopy layer of less than 45m (147ft), presence of tall buildings or concrete pylons with heights of up to 25 metres (76ft) international standard, or emergent tree layer canopy and lattice steel electricity pylon to 100m (328ft) being present in the area. Over populated areas an altitude of 500 feet AGL applies where transmission towers of 500ft are in use, these first installed in the 1940s in the northern hemisphere. |
