ADC stands for which avionics component?

• A. Automatic Direction Finder
• B. Air Data Computer
• C. Air Data Console
• D. Attitude Data Controller

Answer: (B)

ADC stands for Air Data Computer, the unit that converts raw pressure readings from the pitot tube and static ports into usable air data. It processes dynamic pressure to determine indicated airspeed, uses static pressure to figure out altitude and rate of climb or descent, and combines temperature data to help compute Mach number. The data it produces is sent to the airspeed indicator, altimeter, vertical speed indicator, and various flight computers and autopilots, giving the cockpit accurate flight information and enabling automation. The other terms describe different systems: Automatic Direction Finder is a navigation radio for VOR/ADF signals, a general Air Data Console would be a display rather than the data-processing unit, and Attitude Data Controller isn’t a standard avionics component—attitude information comes from the attitude indicator or AHRS.