A drone, which can go by several other names, including unmanned aerial vehicle, unmanned aircraft, or unmanned aircraft system, is an aircraft operated without the possibility of direct human intervention from within or on the aircraft. Commercially available drones that are used for recreational purposes typically are powered by batteries, are controlled by a ground-based control device that communicates with the drone by radio, and may have a limited ability to fly without direct inputs from the ground-based operator.
