Aviation Communication Systems

What is Aviation?

Aviation or Air transport system both refers to the activities surrounding air craft and mechanical flights industry. Aircraft includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft such as balloons and airships.

How An Aviation System helps to safeguard the passage in Air ?

  • Satellite-aided ATC
    When an aircraft is out of range of VHF/UHF radio, such as in oceanic airspace, satellite services enable satellite-aided air traffic control (ATC). The ability to have reliable communications with ground-based controllers at all times, on all major oceanic routes, is an important safety feature.
  • Automatic dependent surveillance (ADS)
    Satellite communication facilitates the automatic reporting of an aircraft’s real-time position, including altitude, speed and heading, via satellite to air traffic control centres, helping controllers know where an aircraft is at all times.

  • Controller / pilot datalink communications (CPDLC)
    Satellite communication also enables the Aircraft Communications Addressing and Reporting System (ACARS) routing instructions, clearances and other messages that need to be sent directly to the cockpit as electronic data messages
  • Voice services
    Satellite services also support air traffic control and critical airline voice communications when the aircraft is out of VHF radio range. The aircraft systems are set up so that cockpit communications have priority over any of the passenger communications, so maximizing safety and reliability.

How Aviation is working ?

Aviation system

History of Aviation system

  • The First World War brought about an urgent need for communications. Voice communications from ground-to-air and from aircraft to aircraft were established
  • In the 1930s, the first all radio-controlled blind-landing was accomplished. By the end of the decade, use of high frequency radio waves was explored and included the advent of high-frequency radar.
  • World War II injected urgency into the development of aircraft radio communication and navigation. Communication radios, despite their size, were essential on board aircraft. Very high frequencies were developed for communication and navigational purposes.

Radio Frequency used in Aviation.

  • Airband or aircraft band is the name for a group of frequencies in the VHF radio spectrum allocated to radio communication in aviation. Different sections of the band are used for radio navigational aids and air traffic control.
  • VHF is used for line-of-sight ground-to-aircraft and aircraft-to-aircraft communications, land mobile and maritime mobile communications, amateur radio, weather radio.
  • Frequency range for VHF is 30 to 300 MHz

CNS/ATM in Aviation

CNS-ATM in Aviation system

  • In aviation CNS stands for ClearCommunication, accurate Navigation and Surveillance-based control and guidance have long been important for safe and efficient flying.
  • Communications, navigation and surveillance systems, employing digital technologies, including satellite navigation systems together with various levels of automation, applied in support of a seamless global air traffic management system.

CNS in Aviation


VHF can transmit information only as fast as a person can speak coherently. Technology such as controller-pilot data link communications (CPDLC) can significantly reduce the demand for bandwidth and time.


Required navigation performance (RNP) equipment must have on-board performance monitoring and alerting systems to provide assurance the system is working properly


automatic dependent surveillance-broadcast (ADS-B). This technology uses GNSS equipment and a transponder-like broadcaster to determine the aircraft’s height, position and speed, and broadcasts this, along with its identity, twice per second.

Benefits of CNS/ATM in Aviation system.

The main benefits of CNS/ATM are:

  • increased aircraft capacity, especially in congested airspace
  • increased schedule flexibility
  • better flight path efficiency
  • less disruption due to delays and diversions

Aviation Communication solution provider

  • Inmarsat provides the ultimate inflight connectivity for the entire aircraft, from voice and safety communications in the cockpit to high-speed, reliable broadband in the cabin.
  • Iridium is the only mobile voice and data satellite communications network that spans the entire globe. Iridium enables connections between people, organizations and assets to and from anywhere, in real time.

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Hamza Arif
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Hamza Arif

Hey, i hamza arif student of telecommunication from BZU, i am good in Networking, Telecommunication and Web Development working on different projects and try my best to teach them to all of you.
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