The study focuses on the modeled processes describing the interaction of the scanning sensor with the element of underwater communication. This task is relevant in constructing the systems for automated monitoring of underwater objects by means of unmanned underwater vehicles. A simple model has been obtained that makes it possible to describe the structural properties of the object’s material or damage on its surface. The mathematical model of interaction between the object and the scanning sensor is presented as a sum of two series. The study shows that in problems of controlling the local structure of the object’s surface, it is possible to present the mathematical model in Kotelnikov expanded form. The obtained results are of high practical importance in solving the problems of laying specialized lines and highways in the territory of the Crimean water area of the Azov-Black Sea basin and regular monitoring their condition