The multi-robot platform will be designed, built and then tested and validated in real-life conditions in four mine test sites, with increasingly harder conditions. The mines that will be used as test sites during the project lifetime are (in temporal and difficulty order):
- Kaatiala Mine, Finland
- Urgeiriça Mine, Portugal
- Idrija Mine, Slovenia
- Ecton Mine, UK
Ecton Mine, that will be the last test site for UX-1, will result in a resurveying of the flooded mine floors that nobody has seen for more than 150 years and that will bring important geological information as well as documentation from important mining heritage lost for a long time.