BAP Manco Cápac
Oneota after her rechristening as Manco Cápac and the addition of two masts
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| History | |
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 United States
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| Name: | USS Oneota |
| Namesake: | Oneota Tribe of the Sioux Indians |
| Ordered: | 1862 |
| Builder: | Alexander Swift & Company, Cincinnati, Ohio |
| Laid down: | 1862 |
| Launched: | 21 May 1864 |
| Completed: | 10 June 1865 |
| Fate: | Sold to builder, 13 April 1868 |
 Peru
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| Name: | BAP Manco Cápac |
| Namesake: | Manco Cápac |
| Acquired: | 1868 |
| Fate: | Scuttled, 7 June 1880 |
| General characteristics | |
| Class and type: | Canonicus-class monitor |
| Tonnage: | 1,034 tons (bm) |
| Displacement: | 2,100 long tons (2,100 t) |
| Length: | 225 ft (68.6 m) |
| Beam: | 43 ft 3 in (13.2 m) |
| Draft: | 13 ft 6 in (4.1 m) |
| Installed power: |
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| Propulsion: | |
| Speed: | 8 knots (15 km/h; 9.2 mph) |
| Complement: | 100 officers and enlisted men |
| Armament: | 2 × 15-inch (381 mm) smoothbore Dahlgren guns |
| Armor: |
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USS Oneota was a single-turreted Canonicus-class monitor built for the Union Navy during the American Civil War. Completed shortly after the end of the war, Oneota was laid up until sold to her builders in 1868, and then resold to Peru. Renamed Manco Cápac, the ship participated in the defense of Arica during the War of the Pacific. When the town was taken by Chilean troops in 1880, she was scuttled to prevent her capture. Her wreck was rediscovered in 1960 and it has been heavily looted.
The ship was 225 feet (68.6 m) long overall, had a beam of 43 feet 3 inches (13.2 m) and had a maximum draft of 13 feet 6 inches (4.1 m). Oneota had a tonnage of 1,034 tons burthen and displaced 2,100 long tons (2,100 t). Her crew consisted of 100 officers and enlisted men.
Oneota was powered by a two-cylinder horizontal vibrating-lever steam engine that drove one propeller using steam generated by two Stimers horizontal fire-tube boilers. The 320-indicated-horsepower (240 kW) engine gave the ship a top speed of 8 knots (15 km/h; 9.2 mph). She carried 140–150 long tons (140–150 t) of coal.Oneota's main armament consisted of two smoothbore, muzzle-loading, 15-inch (381 mm) Dahlgren guns mounted in a single gun turret. Each gun weighed approximately 43,000 pounds (20,000 kg). They could fire a 350-pound (158.8 kg) shell up to a range of 2,100 yards (1,900 m) at an elevation of +7°.
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