In case of development of Air Traffic Control (ATC) systems, it's an important factor that systems have higher usability for Air Traffic Controllers (ATCo) to keep air traffic safety. It is difficult to better understand the special technique and knowledge of ATCo.

    In this research, we are trying to apply the method of distributed cognition (DCog) to analyze the ATCo's activity. DCog analysis makes their knowledge model explicit by examining the transformation and propagation of information through various forms representations. This study is also expected to the application such as a tool of human-centred system design or making training program.