What is the function of a flight director?

The primary function of a flight director is to assist pilots in navigating the aircraft during flights. This system provides visual guidance to the pilot by indicating the appropriate flight path, which helps in maintaining the desired altitude, heading, and speed. By following the flight director's commands, pilots can more effectively manage the aircraft's control surfaces and ensure safe navigation. The flight director essentially acts as an aid for the pilot, enhancing situational awareness and supporting decision-making during various phases of flight, including takeoff and landing.

While the other choices relate to significant aspects of flight operations, they do not accurately reflect the specific role of a flight director. For example, increasing the speed of the aircraft during takeoff involves throttle management rather than navigation assistance. Managing communication with ground control pertains to communication systems rather than navigation guidance. Lastly, providing weather updates is not a function of the flight director, as this responsibility typically falls on dedicated weather information systems or personnel.