The UNEXMIN (Horizon 2020) and UNEXUP (EIT RawMaterials)
projects developed a novel technology to send robots and even autonomously
deliver optical images, 3D maps and other georeferenced scientific data from
flooded underground environments, like abandoned mines, caves or wells. The
concept turned into a market ready solution in seven years, where the last
few years of field trials of the development beautifully demonstrating the
technology's premier capabilities. Here in this paper, we focus on the wide
variety of environments, circumstances and measurements where the UNEXMIN
technology can be the best solution or the only solution to deliver certain
research or engineering data. These are obtained from both simple and
complex environments like different mines and caves, small and large
cavities, long and tight tunnels and shafts, different visibility
conditions, even different densities of the liquid medium where UX robots
operated.</p