At present, the threat of sabotage on hydraulic structures (bridges, dams, drilling rigs, etc.) has increased. In this regard, the creation of effective systems for hydroacoustic monitoring is an urgent task. Aggregation (from lat. Agrego) - the union of individual elements into a coherent whole. In relation to the problem in question, this term denotes the union of a number of object states, or more precisely, a group of objects with certain common properties. The article presents an aggregation method using a single criterion characterizing the minimum of information loss