This book presents concepts for radio engineers to ensure electromagnetic compatibility based on the methodological approaches to reduce the probability of failures of radio equipment and improve the flight safety of complex aerospace systems. The book deals with issues related to methods for assessing the electromagnetic compatibility of integrated ground and on-board complexes, methods for obtaining information about unintentional interference, the theory of predicting unintentional interference, experimental studies of the characteristics that determine electromagnetic compatibility, methods for calculating reference systems, the influence of the method of generating the output signals of the transmitting path on the relative level of spurious radiation, electromagnetic compatibility of ultrahigh-frequency devices with phase modulation, with the features of industrial noise, with the calculation of electromagnetic fields scattered elements of the airframe, with direction findingerrors caused by the scattering of electromagnetic fields by elements of the airframe, with the evaluation of isolation between antennas in the presence of an electromagnetic screen, solving problems of electromagnetic compatibility of antenna devices with the model electromagnetic interference radio systems, calculation of electromagnetic compatibility of specific navigation systems, with the provision of electromagnetic compatibility in civil aviation, taking into account modern requirements.