Accipiter UAS is designed with wing-airframe and made completely of composite material. The power plant adopt a high performance 2-stroke gasoline engine. The combination of compete avionics and traceable high-level image optical payload allows autonomous flight missions. The complete ground control station coupled with tracking antenna system allows achievement of better specifications of overall system in mission implementation. In applications, the system is capable of coast patrols, river and forest observation, firefighting and rescue, environmental pollution detection and crime intelligence and evidence collection etc. Also, the features of high mobility and real-time data transmission are perfect for acquisition of ground monitoring images through the high-performance UAVs that are capable of stable automatic flights control, while the images acquired are transmitted to ground control station via radio communication link for operator's viewing. The user can pre-program flight missions or in-flight post-mission reconstruction in real-time for control of UAVs.