Eight Zetron DCS-5020 Digital Consoles are used to expedite an R3.6m upgrade to the 861 km freight line which transports over 60 million tonnes of iron ore every year between mines in the Northern Cape and the deep water port of Saldana in South Africa. More than 3.5 km long, with eight locomotives and 342 wagons, the trains that carry the export iron ore on the line are the longest in the world.