This book includes high-quality research papers presented at 3rd International Workshop on Advances in Civil Aviation Systems Development (ACASD 2025), which was joint event of School of Aeronautics and Astronautics of Purdue University (IN, USA) and National Aviation University (Kyiv, Ukraine). This book presents original results of a scholarly study of unique research teams and market leaders on the development in civil aviation systems and its application. The book topics include major research areas focused on advances in air transportation, interference in global navigation satellite system, aircraft noise, communication systems for civil aviation systems, surveillance data processing, methods of operational efficiency improvement, sensors in civil aviation, human factor, and unmanned aircraft systems. Book is useful for scholars and professionals in the civil aviation domain.