RiserTec has been involved in the engineering and design of a new subsea system intended to harvest critical base metal nodules from the seafloor. RiserTec's involvement over the period of around 1 year so far has mainly been in the global analysis & fatigue analysis of the lifting system that will carry the nodules from the seafloor to surface, with its main component being a 4.5km riser. The nodules contain high grades of nickel, manganese, copper and cobalt - key metals required for building electric vehicle batteries and renewable energy technologies.