The use of augmented reality makes it possible to simplify the process of determining the location of elements of underground utilities and improve its results in terms of performance, accuracy and safety. The article shows that the existing methods of position and direction calibration for visualizations of underground communications in systems with augmented reality require special equipment and certain conditions for their implementation. The main sources of error in the placement of visualizations of underground communications on the screen are determined. A simple method of position and direction calibration based on placing a smartphone at a point in space with known coordinates and requiring no special equipment is proposed. The method includes a calibration script and an instrumental mobile application for a smartphone with an Android operating system. The ARCore framework is used as the main tool for working with augmented reality. Practical tests have shown that this method, with certain errors, copes with the calibration, and is also simple to implement. The application has been published on Google Play, which will allow a wide range of developers and users to evaluate its advantages and disadvantages. Further research involves finding ways to reduce the errors of the proposed method and ensure its interaction with ArcGis objects.