An unmanned aerial vehicle (UAV) (also known as a drone) is an aircraft that does not have a human pilot on board. Unmanned aerial vehicles (UAVs) are part of an unmanned aircraft system (UAS), which consists of a UAV, a ground-based controller, and a communication system between the two. UAVs may have varying degrees of autonomy in their flight. UAVs were initially used for missions that were too "dull, dirty, or dangerous" for humans, as opposed to crewed aircraft.
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