IDS GeoRadar, industry leader in radar technology for slope stability monitoring in open-pit mines, has brought its expertise to the underground mining industry. HYDRA-U is a remote sensing monitoring system able to provide real time monitoring of surface deformations and management of ground hazards over large areas. HYDRA-U provides the high-accuracy (<0.1 mm) and high resolution typical of radar technology to support geotechnical engineers in guaranteeing a safe access to working places of the complete mine structure, protect the major service openings throughout their designed duty life, and assess the performance of ground supports