This course covers the subject of autothrust systems on jet aircraft. The autothrust system, also known as 'auto-throttle', is an electronic or electromechanical device that automatically controls engine thrust. It can be selected to control thrust based on phase of flight or specific flight parameters such as airspeed and angle of attack. Indications of the current auto-thrust mode and status are shown on the Flight Mode Annunciator (FMA), the autopilot control panel and the engine display. The course covers basic concepts such as the relationship between auto-thrust and autopilot, the principles of the thrust setting function, and the two main types of auto-thrust systems.