Manta Marine Design/FairTransport BV
The four-masted 377-foot-long Ecoliner from Dutch shipbuilder Fair Transport B.V. may be the first of a new fleet that uses sails for primary propulsion. Unlike traditional sailing ships with crisscrossing lines and rigging, the Ecoliner has four freestanding sails, each of which electronically rotates to achieve the best angle. When there's not enough wind, a diesel-electric engine kicks in to power a propeller. The Ecoliner, which can transport 200 containers using up to 90 percent less fuel than a similar-sized conventional vessel, could haul its first load by fall 2013.