Photo #: NH 59367 Our New Gun-boats Engraving published in Harper's Weekly, July-December 1861 volume. It depicts ten of the 90-Day Gunboats constructed for the U.S. Navy in 1861-62. Ships, as identified below the image bottom, are (from left, all USS): Chippewa, Sciota, Itasca, Winona, Huron, Ottawa, Pembina, Seneca, Unadilla and Sagamore. U.S. Naval History and Heritage Command Photograph.