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ENR 1.6 – RADAR SERVICE AND PROCEDURES 1. Introduction 1.1. Radar control procedures will be used by ATC in preference to non-radar control procedures whenever ATS or the aircraft served will gain operational advantage 1.2. The provision of radar service to aircraft is subject to i) Communication system availability and reliability ii) Radar equipment limitations, and iii) The capability of the controller to revert to non-radar separation in the event of radar failure. 1.3. The following types of radar services may be provided to aircraft operating within reliable radar coverage- i) Radar control service -for aircraft operating within Class D and E airspace ii) Radar advisory service -for aircraft operating within Class F airspace iii) Radar flight information service -for identified aircraft operating in any part of FIR 1.4. The provision of any of the above types of radar service requires that aircraft remain in direct two-way communication with the unit providing the service. However, radar separation may be provided between two radar identified aircraft even when only one of the aircraft is in direct communication with the radar unit. 1.5. In the event of an aircraft in or appearing to be in, any form of emergency ATC will provide all possible assistance, including the provisions of radar service to the extent possible.
2. Use of radar in air traffic control service
2.1. The information presented on a radar display may be used to perform the following functions in the provision of air traffic control service. 2.1.1. Provide of radar service to- i) Improve airspace utilization ii) Reduce delays iii) Enhance safety 2.1.2. Provide radar vectoring to- i) Departing aircraft for expeditious and efficient departure flow and expediting climb to cruising level ii) Arriving aircraft for the purpose of expediting descent from cruising level and establishing an expeditious and efficient approach sequence iii) Aircraft for the purpose of resolving potential conflict iv) Assist pilot in their navigation
2.1.3. Provide separation and maintain normal flow when an aircraft is experiencing communication failure is within area of radar coverage 2.1.4. Maintain radar monitoring of traffic 2.1.5. Monitor the progress of air traffic in order to i) Obtain improved position information regarding aircraft under control ii) Obtain supplementary information regarding other traffic iii) Detect significant deviations by aircraft from their assigned routings or level. Note – To be considered ‘significant’ an aircraft’s track deviations should be sufficient to take it beyond the boundary of the route being followed or be assessed by the radar controller as liable to take it beyond the edge of the protected airspace of the route being flown. 3. Use of SSR without primary radar 3.1. Secondary Surveillance Radar (SSR) information may be used alone in the provision of separation between aircraft provided; aircraft identification is established and maintained by use of discrete SSR codes. www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：印度 AIP INDIA AIP ENR 1.6 – RADAR SERVICE AND PROCEDURES
