![]() ![]() ACARS also provides a way of instantly updating dispatch in the event of a diversion or emergency. ![]() Aeronautical Operational Control (AOC) – the AOC function of ACARS is used regularly during a typical flight by the pilots to receive the load sheet prior to departure, to obtain updated weather reports enroute, to report delays to dispatch or even request updated flight plans (for example if a planned cruising altitude is unavailable).Also D-ATIS (Digital Automatic Terminal Information System) falls under the ATC function. Air Traffic Control (ATC) – the most common use of ACARS with ATC is for clearances such as Pre Departure Clearance (PDC) and Oceanic Clearance (OCX).SATCOM (Satellite Communication) – SATCOM links are available in most places on the planet except in polar regions.HF (High Frequency) – HF Data Link (or HFDL) functions at long-range including over the ocean and in polar regions.VHF (Very High Frequency) – this is for short-range communication limited by line of sight.What are the three types of ACARS messages?ĪCARS allows text-based messages to be sent between aircraft and other stations, for example OOOI messages to airline dispatch or maintenance departments, or to request up to date weather reports while in flight.ĭatalink Service Providers (DSPs – for examples SITA or ARINC) are responsible for the transmission of messages between stations.ĪCARS messages are received on the aircraft by one of three methods:. ![]()
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