Aircraft Transmissions Decoders

Decoding aircraft transmissions for amateur radio

Austin
Reviewed by • Digital Modes & Software Editor March 2026

ACARS, or Aircraft Communications Addressing and Reporting System, is a digital datalink system used by aircraft to transmit short messages to ground stations. Ham radio operators with suitable receivers and software can often monitor these transmissions, which typically include flight numbers, aircraft type, position reports, and operational messages. This activity offers a fascinating glimpse into aviation communications, distinct from typical voice or digital modes used for amateur radio activity.

Many hams interested in aviation monitoring use specialized software to decode ACARS signals. Programs like acarsd and PlanePlotter allow operators to process audio from a receiver, often using a sound card, to display decoded messages and even plot aircraft positions on a map. Other tools, such as WACARS and SkySpy ACARS, provide real-time message decoding and aircraft tracking, enhancing the monitoring experience for those exploring these unique frequencies.

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