Nicholas Roosevelt (inventor) 74-gun ships. In 1797, with Robert R. Livingston and John Stevens, he agreed to build a boat on joint account, for which the engines were to be constructed by Roosevelt, and the propelling agency was to be that planned by Livingston. The experiment failed, the speed attained being only equivalent to about in still water. On September 6, 1798, Roosevelt described and earnestly recommended to Livingston a vertical wheel, which is the first practical suggestion of the combination that made steam navigation a commercial success, although four years later Robert Fulton believed that chains and floats were alone to be
Hunley-class submarine tender ones. The ships were powered by ten Diesel engines, delivering 15.000 SHP on one shaft. Both tenders were decommissioned following the retirement of the "Poseidon"-equipped SSBNs. After spending at least a decade in the Reserve Fleet, both ships were scrapped. Hunley-class submarine tender The "Hunley"-class was a class of two submarine tenders in service with the United States Navy from 1962 to 1996. The "Hunley"-class was the first class of submarine tenders in the U.S. Navy being built from the keel up to service ballistic missile submarines (SSBN). The early generations of SSBNs were equipped with the UGM-27 Polaris missile.