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Aviation is the vital component of the world's transportation system.It has grown multi-fold over the last 30 years and is set to growing at around 4-5% per annum, with some regional variation. Such growth is not possible without effective involvement of human-machine coordination for safe movement of aircraft in sky.
Over the last 10 years it has become clear that the impact of changes in technology has forced the aviation industry to bring about the reliance on data communication for controller-pilot exchanges on aircraft position, altitude etc. With the advent of pervasive internet communication technology, new ways have emerged in aeronautical applications and real-time flight data are being better managed for reduced separations among aircraft in the sky. In fact, the ultimate objective is to allow aircraft to safely fly in any path as desired in the sky assisted by satellite systems.
The essential part of the current communication system has now become Air Traffic Service Message Handling System (AMHS) in place of Aeronautical Fixed Telecommunication System (AFTN) for exchanging flight plans, notices to airmen (NOTAM), Weather information among aviation partners.
Aviation Navigation strategy is also set for a change to use Global Navigation Satellite System (GNSS) in all flight phases including final approach phase where the Ground Based Augmentation System (GBAS) will replace the use of Instrument/Microwave Landing Systems (ILS/MLS) for electronically computing aircraft position for the Precision Approach.
The aviation surveillance field has already embraced the datalink technologies such as Automatic Dependent Surveillance (ADS) and Controller Pilot Data Link Communication (CPDLC) in place of conventional RADAR technologies.
Thus communications systems have become essential elements of the integrated Air Traffic Management/Communications, Navigation and Surveillance (ATM/CNS) system. The boundaries of communications domain have fallen beyond data and voice transfers and dominates in every aspect of Air Traffic Management environment.