When supplying NDT equipment to the foreign customers, OKOndt GROUP also provides a training services at the customer's territory so that local specialists understand all the peculiarities and can use all the functionality of the device. In November 2019, OKOndt's experts arranged such a trip to Italy — to show the technical personnel of the customer's company how effective ultrasonic single rail flaw detector UDS2-77 can detect rail flaws. A «Tandem» sounding scheme implemented in this trolley allows also to detect flaws in the side faces of the rail head thus making the testing much more effective.