Ultrasonic single rail flaw detector UDS2-77 is capable of detecting the defects on the rail head running surface and side faces increasing the area being tested and making the testing itself more effective. In the course of the training, the specialists of the Italian company IMG Ultrasuoni Srl learned the software and mastered all the capabilities of the rail trolley, as well as practiced using it under the guidance of OKOndt GROUP's expert. Besides, the presentation of the flaw detector to the personnel of RFI - Rete Ferroviaria Italiana (Milan office of the Italian Railways) was held.