Avionics is the category of electronic systems that are used in aircraft, artificial satellites and spacecrafts. Avionic systems involve communication, navigation, and collision-avoidance system. It also includes the display and management of multiple systems that are fitted to aircraft to perform individual and specific functions. These functions can be simple as well as complex in nature. Communication system helps in connecting the flight deck to the passengers and the flight deck to the ground. Navigation systems help in calculating the position automatically and displaying it to the flight crew on moving map displays. Collision-avoidance system deals with air traffic control. It can detect the location of the nearby aircraft and provide instructions for avoiding a mid-air collision. This book aims to shed light on some of the advanced principles in the field of avionics. It strives to provide a fair idea about this discipline and to help develop a better understanding of the latest advances within this field. It is appropriate for students seeking detailed information in this area as well as for experts.