Abstract: An automatic drift corrector is provided for correcting the heading of an aircraft, boat, or other vehicle for drift. The drift corrector operates a synchro generator included in an automatic pilot system of the vehicle. The drift corrector includes a motor coupled to a control of the synchro generator, a variable voltage generator, a vane outside the vehicle and rotatable by drift of the vehicle to vary the voltage generator for generating a drift signal, an amplifier for applying the drift signal to the motor for causing the motor to operate the control of the synchro generator to correct for the drift, and a power supply for supplying power to the foregoing elements.