Shofu Maru is cutting greenhouse gases. Last century, Swift Wings was just saving fuel

Swift Wings at BHP in 1991. The logos on the sails have been repainted since the 1988 visit to the grain terminal recorded by Ken Longworth, but it's the same vessel. Picture by Bill Ruddick

Bill Ruddick, who photographed Swift Wings on the BHP wharves at the steelworks when he was working there. His files have the date as 1991. Picture courtesy of Aubrey Brooks

A shot of the Swift Wings sail. The technology is easily recognisable, with the strong tubular mast and the rotating expandable sail. Picture by Bill Ruddick