Which component provides critical data for autopilot systems?

The Flight Management Computer (FMC) plays a vital role in providing critical data for autopilot systems. It processes information from various aircraft systems to support flight planning, navigation, and performance calculations. By integrating data such as current position, altitude, speed, and flight trajectory, the FMC enables the autopilot to execute precise control over the aircraft's flight path. Essentially, it serves as the brain for the navigation tasks that the autopilot undertakes, allowing for automated flying either in a straight line or through complex waypoints.

While Integrated Modular Avionics, Digital Flight Data Recorders, and Communication Management Units contribute significantly to various flight operations and systems, they do not directly supply autopilot systems with the essential navigation and flight control data required for their functioning, which highlights the specific role of the Flight Management Computer in this context.