Southern Avionics Company | 914 followers on LinkedIn. Southern Avionics leads the industry by producing numerous stationary, transportable and portable NDBs, designed to satisfy diverse site and operational requirements. Constructed to provide years of continuous, unattended operation in extreme offshore conditions, Southern Avionics NDBs are also at home in the remote and harsh environments of deserts, equatorial jungles, and polar regions. Thousands of Southern Avionics NDBs are currently in service in these remote areas, as well as, Civil Aviation Airports throughout the world.