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The article discusses the main features of the organization of telemetry in directional drilling. The constant increase in the complexity of the conditions for the development and operation of fields, oil and gas production, an increase in the intensity of development of already explored fields due to horizontal and cluster drilling required a significant increase in the requirements for the accuracy of diagnostics and active control of the spatial position of the field. In general, the accuracy of measurements and the efficiency of their processing largely determine the cost of well construction. Directional drilling is one of the well construction methods. The most effective directional drilling application is the development of fields located in water areas, in swampy or rugged terrain, where the construction of drilling rigs may violate the requirements for environmental protection and environmental safety. Directional drilling is also widely used in the creation of relief wells for killing blowouts, for forming multilateral wells or deviating the lower part of the well along the productive horizon in order to increase drainage. Well profiles may vary, but the top of the deviated wellbore must be vertical, followed by a deviation of the calculated azimuth. Therefore, the main task of the telemetry system in directional drilling is to constantly monitor the planned trajectory, as well as to maintain the bit trajectory within the corridor that runs inside the open formation. [ABSTRACT FROM AUTHOR]