English: The patent-pending VolturnUS 1:8, was designed and built at UMaine, assembled at Cianbro’s facility in Brewer, successfully towed nearly 30 miles from Brewer by a Maine Maritime Academy tugboat, and anchored for testing off the coast of Castine, Maine in 90 ft of water. On June 13, 2013, the turbine was energized and began delivering electricity through an undersea cable to the Central Maine Power electricity grid, making VolturnUS 1:8 the first grid-connected offshore wind turbine in United States.