Windjammers are large sailing ships that were used in the late 19th and early 20th centuries for commercial purposes. The term 'WINDJAMMER' is derived from the combination of two words: 'WIND' and 'jammer, ' which refers to the large sails used on these vessels. The boats used for windjammers were typically large, three-masted sailing ships with a square-rigged foremast and a fore-and-aft rigged mainmast and mizzenmast. They were used to transport cargo across the world's oceans and seas.