The Unadilla class was a class of gunboat built for the Union Navy at the outbreak of the American Civil War. Ships of the class were also known as "90-day gunboats" due to their rapid construction. The class was designed to be fully oceangoing while having a light enough draft to be able to operate close inshore, for blockade duty or other operations in shallow waters.
Lithograph of a Unadilla-class gunboat, ca. 1861
The hulls of the Unadilla-class gunboats may have been modelled on the 1860 rebuild of USS Pocahontas
USS Unadilla under construction at the yard of John Englis, New York
USS Aroostook in Chinese waters, ca. 1867
The Morgan Iron Works was a 19th-century manufacturing plant for marine steam engines located in New York City, United States. Founded as T. F. Secor & Co. in 1838, the plant was later taken over and renamed by one of its original investors, Charles Morgan.
Morgan Iron Works
Steam sloop-of-war USS Wachusett
USS Dolphin, focus of a bitter political battle between John Roach and the U.S. Navy