Ir. Emiel Mobron studied the economic feasibility of cargo ships with sails for his graduation project in marine engineering (Faculty of 3mE). He made his calculations using Dijkstra Naval Architects‘s Ecoliner, a 138-metre-long ship with a loading capacity of 8,200 tons, propelled by a combination of diesel engine and four DynaRig masts. His calculations showed that, at a cruising speed of 11 knots (about 20 kilometres per hour), the ship used only half the amount of fuel it would have used without the sails. The ship itself is more expensive, but due to the fuel savings, it can transport cargo 11% more cheaply (in euros per tonne kilometre).