Have you ever peered through the cockpit of an aircraft to see how pilots fly a plane? They can manually fly the plane by taking the controls and steering the aircraft in the right direction for many miles. After a while, the Pilot may decide to tell the plane where to go by activating the autopilot. He or she is constantly watching, just in case something goes wrong with the controls thereby affecting the flight or the plane. Ultimately, this pilot is in control of that plane.