Airfield Aerodrome Ground Lighting AGL, which typically cover runway centreline, touchdown zone, edge and taxiway lights, support safe, efficient and regular aircraft operations by providing essential visual guidance to pilots and aerodrome personnel. Minimum operating criteria for these installations have now been established by all the major regulatory authorities ICAO, UK CAA, FAA Research has shown that the traditional methods of measurement and AGL maintenance still employed by most airports are not sufficient to maintain systems within the standards now set.

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