provides the Area Control Service, Flight Information Service and the Alerting Service. The Area Control centres are connected to the terminal airports and adjacent Area Control Centers by Direct Speech Circuits. Area Control Center receives feed from 11 radars (ARSR/MSSR) with a range of 250 nautical miles and 9 ADS-B Ground Stations covering the entire continental airspace and portion of Oceanic airspace (the portion of Bay of Bengal) under its jurisdiction. The major routes transiting through the FIR are R460, L759, A465, A791, G450, R581, R325, R344, L507, P646, M770, M773, N895, G472, L301, L510, N877, L524, M875 and P628. Netaji Subhash Chandra Bose International Airport, Kolkata is equipped with an ELDIS ASR/MSSR and INDRA MSSR with a range of 250 nautical miles and an automated ATC system developed by INDRA. Specially designed standard procedures like SIDS and STARS are used to complement laid down ATS routes. To cope with the periods of very low visibility due to fog, special ILS CAT III (B) equipment is installed at NSCBI Airport, Kolkata. The automation of ATS facilities are at Biju Patnaik Airport, Bhubaneswar, Birsa Munda Airport, Ranchi, Jai Prakash Narayan International Airport, Patna, Swami Vivekananda Airport, Raipur and Gaya airports also. Other operational active Airports in the Eastern Region are Jharsuguda, Kazi Nazrul Islam Airport, Durgapur (Bengal Aerotropolis Projects Limited), Pakyong, Cooch Behar, Port Blair (Civil Enclave), Darbhanga (Civil Enclave) and Bagdogra (Civil Enclave). b. Flight Information Service: The Aircraft operating beyond the radar coverage and outside the control areas are provided with flight information service and advisory service by the Area Control Centres. The Nodal Centre of NOTAM is also at NSCBI Airport, Kolkata. c. Alerting Service (Search and Rescue): All the airports are established alerting posts and the specific Alerting Services are provided by the concerned Area Control centres. For this purpose close liaison is maintained with agencies like INMCC, THE INDIAN AIR FORCE and the adjacent Search and Rescue coordination centres. The distress signals picked by SARSAT and COSPAS are linked to the Indian Space Research Organization (ISRO). 'd. Aeronautical Information Services Commercial Department The department deals with providing various facilities for the passengers such as Retail, F&B, Duty-Free, Money Exchange, Car Rental, Vehicle Parking etc. References India Companies based in New Delhi Indian companies established in 1995 Aviation authorities Government agencies established in 1995 Ministry of Civil Aviation (India) Air navigation service providers 1995 establishments in Delhi