Indira Gandhi International Airport, Delhi ILS Category III Aeronautical Assessment

Airport Authority of India

New Delhi, India

On behalf of the ICAO Technical Cooperation Bureau and the Airport Authority of India, LEAPP carried out a technical audit and an aeronautical study to inspect, assess and confirm the compliance of preparations made by the Airports Authority of India (AAI) to install and commission an ILS Category IIIA instrument approach at the Indira Gandhi International Airport (IGIA), New Delhi.

LEAPP inspected Runway 11/29 and its obstacle and lighting environment for compliance with ILS Category III requirements in terms of the runway strip obstacles, runway pavement and edge lighting, approach lighting, signage and markings, as well as the taxiways leading into the primary runway. Also considered were the adequacy of the ground movement radar and Met equipment and Met reporting system.

LEAPP conducted computer modelling of the approach, runway and missed approach environment using the ICAO Collision Risk Model and developed remedial actions to ensure compliance with ILS Category III requirements. In addition, LEAPP also ensured that all safety requirements of ICAO for low visibility operations were met. The airport has qualified for Category IIIB operations which are required due to winter fog and smog conditions in the vicinity of the airport.