Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Algorithm for Developing Block Diagrams of Navigation and Flight Dystems as Part of the On-Board Equipment of a Transport Unmanned Aerial Vehicle O.V. SKUDNEVA The materials of this article discuss the interaction as part of the onboard navigation and flight equipment of a transport unmanned aerial vehicle (UAV) of various structural diagrams of automatic navigation and flight systems (NPS), based on the use of autonomous heading systems – heading and inertial systems and the use of high-precision positional radio systems – satellite navigation systems (SNS) and ground-based radio ranging systems (RDS) in connection with the requirements of modern industry for the development of transport aviation for the development of the Arctic and work in remote areas of the country. The implementation of the optimal algorithm for calculating the navigation parameters of the NPS when working with 3 RDS on the route and during automatic landing of an aircraft (AC) provides the requirements for the safety and accuracy of landing of an aircraft in the absence and with unstable operation of a satellite navigation system (SNS). This algorithm, implemented on unmanned and manned aircraft, eliminates the “human factor” on UAVs, and reduces it to a minimum on manned aircraft. Keywords: Navigation and piloting system, transport unmanned aerial vehicles, algorithm for calculating the location of an aircraft. DOI: 10.25791/pribor.9.2023.1437 Pp. 10-18.