An autobrake is a type of automatic wheel-based hydraulic brake system for advanced airplanes.
[1] The autobrake is normally enabled during takeoff and landing procedures, when the aircraft's longitudinal deceleration system can be handled by the automated systems of the aircraft itself in order to keep the pilot free to perform other tasks.
During the roll out, application of the brake pedals transfers control back to the pilot.
In RTO setting, the aircraft monitors certain variables, depending on the autobrake model.
Other autobrake systems may monitor critical flight controls for failures.