unmanned aircraft system

Unmanned Aircraft System (UAS) is the term introduced by The United States Department of Defense (DoD) and adopted by the Federal Aviation Administration (FAA) to replace the term Unmanned Aerial Vehicle (UAV). A typical UAS consists of the Unmanned Aircraft (UA), the Control System, the Datalink, and other related support equipment. For example, the RQ-7 Shadow UAS consists of four Air Vehicles, two Ground Control Stations (GCS), one Launcher, one portable GCS, two Ground Data Terminals (GDT), one portable GDT, and one Remote Video Terminal. Certain military units are also fielded with a maintenance support 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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