Plain English Meaning

All the radios and related electronics in the aircraft that let the pilot talk to controllers and other pilots, and pick up signals used for navigation.

Full Definition

The collection of electronic devices installed in an aircraft used to transmit and receive voice communications and navigation signals. In general aviation aircraft, this typically includes one or more VHF communication radios (COMs), navigation radios (NAVs) such as VOR and ILS receivers, a transponder for ATC radar identification, and often supporting equipment like an audio panel, GPS receiver, and ADS-B unit.