unmanned aircraft

Unmanned Aircraft (UA) is a term used in the Federal Aviation Administration (FAA) definition of Unmanned Aircraft System (UAS). UA refers to the aircraft portion of the system required to operate it, also known as Unmanned Aerial Vehicle.
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An unmanned aerial vehicle (UAV) is an aircraft with no onboard pilot. UAVs can be remote controlled or fly autonomously based on pre-programmed flight plans or more complex dynamic automation systems. UAVs are currently used in a number of military roles, including reconnaissance and attack. They are also used in a small but growing number of civil applications such as firefighting where a human observer would be at risk, police observation of civil disturbances and scenes of crimes, and reconnaissance support in natural disasters.
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