| avia., avia., ICAO |
Movement of a helicopter VTOL above the surface of an aerodrome, normally in ground effect and at a ground speed normally less than 37 km/h 20 kt. Note ICAO: The actual height may vary, and some helicopters may require air-taxiing above 8 m 25 ft AGL to reduce ground effect turbulence or provide clearance for cargo slingloads. |
