Abstract
Recently, the tasks involved in Air Traffic Control (ATC) make heavy demands on the information processing capacities of the Air Traffic Controllers. In particular, human factors problems that lead to both major and minor incidents are considered to be a serious problem for ATC in Air Traffic safety. Therefore, the need to analyse the error occurrence mechanism which occurs due to complex factors, and the need for developing systems that can deal with these errors, are increasing. This research focuses on analysis of the Air Traffic Controller's tasks for En-route ATC and modeling air controller's cognitive process models.