The Air Data Computer (ADC) is responsible for processing and providing accurate airspeed, altitude, and other related data to various aircraft systems.

Flaps are used to increase lift and drag during takeoff and landing, but they are not considered primary flight control surfaces.

The Flight Management System (FMS) is responsible for storing, managing, and calculating flight plans, including waypoints, altitudes, and navigation data.

The Global Positioning System (GPS) is widely used in modern aircraft for precise navigation and positioning.

The Transponder is used to transmit aircraft identification and altitude data to air traffic control and other aircraft.

Adjusting engine power settings is not a primary function of an autopilot system.

The Traffic Collision Avoidance System (TCAS) is designed to detect and alert pilots to nearby aircraft, reducing the risk of mid-air collisions.

Very High Frequency (VHF) is commonly used in aircraft for communication with air traffic control and other aircraft.

The Flight Data Recorder (FDR) is used to record various flight parameters and data for analysis and investigation in the event of an incident or accident.

Communicating with air traffic control is not a primary function of an Electronic Flight Instrument System (EFIS).

The Weather Radar system is used to detect and display weather patterns, such as precipitation and turbulence, to assist pilots in avoiding hazardous weather conditions.

Barometer is not commonly used as a sensor in aircraft avionics systems.

The Head-Up Display (HUD) projects flight information, such as airspeed, altitude, and navigation data, onto the pilot's field of view, allowing them to keep their eyes focused outside the cockpit.

Very High Frequency (VHF) is not commonly used for long-range communication in aircraft.

The Inertial Navigation System (INS) uses internal sensors to provide accurate navigation data, such as position, velocity, and attitude, without relying on external signals.