From a luxury liner crossing the cold waters of the north Atlantic, Brave Tern may look like an uncharted island rising from the sea. But sail closer, and you will see an unusual ship making history. The boxy, 132-meter-long, 39-meter-wide wind turbine installation vessel framed by four soaring steel columns is carrying five massive nacelles for Deepwater Wind’s Block Island Wind Farm, America’s first offshore wind farm.