<b>Compilation of an Algorithm for the Activity of an Air Traffic Service Controller as a Source of Optimization of the Flight Safety Management</b> The article discusses the importance of building the logical activity of the air traffic service controller, consisting of a set of actions and operational units of information, to reduce the negative impact of errors on their activities. A table has been compiled showing the role of the controller in the aviation system. In particular, all the negative factors that affect the mental activity of the air traffic controller from the moment of receipt of information to the adoption of a decision are considered. flight safety, air traffic control, psychology, algorithm, errors, factors, air traffic controller, aviation, aviation incidents, automated systems 5-8 International Research Development and Scientific Excellence in Academic Life Special Issue Shamsiev Zair Ziyayevich | Sharipova Alsu Rafikovna