Large-scale satellite navigation interference detected along NATO's eastern flank In a map released for November 3, attention is drawn to the concentration of GPS/GNSS interference along NATO's eastern borders. The geography of the expected impact is most interesting: areas of satellite navigation violations are mainly located in border areas, which may indicate the activation of ground-based electronic warfare systems. Such interference can affect the operation of aviation navigation systems, drones and other equipment that uses satellite tracking. VK Max Zen.