ABSTRACT
In the 1970s, the airlines introduced data communications to aircraft in flight for company communications using the Aircraft Communications Addressing and Recording System (ACARS). Various trials by air navigation service providers have proven the effectiveness of data communications for Air Traffic Control. The combination of higher usable frequencies and improved modulation techniques has served to extend the useful life of air–ground voice communications for nearly a century. The data link was initially called the Aeronautical Radio Inc (ARINC) ACARS, but “ARINC” was soon changed to “Aircraft” in recognition of the nonproprietary nature of the new medium. The data link was initially called the ARINC ACARS, but “ARINC” was soon changed to “Aircraft” in recognition of the nonproprietary nature of the new medium. The latest avionics for each of the four subnetworks accepts an ACARS block as a data message over a data bus, typically ARINC 429.
