The article considers the classification of airborne vehicles in the automated air traffic control system, which is essential for improving the level of air traffic safety. Proposed is a new method of airborne vehicles' classification which differs from the existing ones, as it is distinguished by integrated data processing from heterogeneous sources, formalizing the characteristics of airborne vehicles based on binary relationships and production models, the hierarchical structure of airborne vehicles' classification and the structural features of the singleton knowledge base. This article is the sequel to the earlier articles written by the authors on air navigation issues. © 2021 CEUR-WS. All rights reserved.