Unmanned Aircraft System (UAS): A comprehensive term used in military and regulatory contexts to describe the entire integrated ecosystem required to operate an unmanned aircraft. Unlike the term “UAV,” which refers strictly to the airframe itself, a UAS encompasses four primary components: the Unmanned Aerial Vehicle (UAV), the Ground Control Station (GCS), the Command and Control (C2) data links, and the human operator. By defining the technology as a “system,” military doctrine emphasizes that flight and mission success depend on the seamless interaction between the hardware in the sky and the support infrastructure on the ground.