Editorial use only. From Wikipedia: " The E-Ship 1 is a RoLo cargo ship that made its first voyage with cargo in August 2010. The ship is owned by the third-largest wind turbine manufacturer, Germany's Enercon GmbH. It will be used to transport wind turbine components. The E-Ship 1 is a Flettner ship: four large rotorsails that rise from its deck are rotated via a mechanical linkage to the ship's propellors. The sails, or Flettner rotors, aid the ship's propulsion by means of the Magnus effect—the perpendicular force that is exerted on a spinning body moving through a fluid stream."