Oto, Ōtō, or OTO may refer to:
Zara was a heavy cruiser built for the Italian Regia Marina, the lead ship of the Zara class. Named after the Italian city of Zara, the ship was built at the Odero-Terni-Orlando shipyard beginning with her keel laying in July 1928, launching in April 1930, and commissioning in October 1931. Armed with a main battery of eight 8-inch (200 mm) guns, she was nominally within the 10,000-long-ton (10,000 t) limit imposed by the Washington Naval Treaty, though in reality she significantly exceeded this figure.
OTO Melara was a subsidiary of the Italian company Finmeccanica, today Leonardo, active in the defence sector, with factories in Brescia and La Spezia. The Mod 56 pack howitzer, in service throughout the world, and the 76mm naval gun, adopted by 53 navies and installed on over 1,000 naval vessels, are among OTO Melara's best-known weapons since World War II.
The Tashkent class consisted of a single destroyer leader, built in Italy for the Soviet Navy just before World War II. Three others were ordered from shipyards in the Soviet Union, but they were cancelled before they were laid down as they were too difficult to build with the existing technology in Soviet shipyards. Completed in 1940, Tashkent participated in the Sieges of Odessa and Sevastopol in 1941–1942, during which she ferried reinforcements and supplies into those cities, evacuated wounded and refugees, and provided naval gunfire support for Soviet troops. The ship was badly damaged twice by Axis bombers before she was sunk in harbor in mid-1942. Her wreck refloated in 1944, but it was too badly damaged to be worth repairing and was scrapped after the war.
The 320 mm naval gun was the main battery gun used to modernize Italy's World War I battleships for service during World War II. The guns were manufactured by boring out and relining the battleships' original 12"/46 (30 cm) built-up guns and modifying the turrets to increase elevation above the original 20° maximum. Each ship carried two 548-tonne twin turrets and two 745-tonne triple turrets. All guns used pneumatically operated side-swing Welin breech blocks. Each barrel could fire two rounds per minute.
Events in the year 1927 in Brazil.
Cantiere navale fratelli Orlando is an historical Italian shipyard in Livorno.
Cantieri navali Odero is a defunct Italian shipyard. Founded in 1846 by the Westerman brothers in Genoa-Sestri Ponente, the company was taken over by Nicolò Odero in 1872. Together with the Ansaldo-San Giorgio shipyard at Muggiano and the armament works of Vickers-Terni, it was amalgamated into Odero-Terni by Attilio Odero, which, in turn, absorbed the Cantiere navale fratelli Orlando of Livorno two years later. The consolidated company became the Società per la Costruzione di Navi, Macchine ed Artiglierie Odero-Terni-Orlando (OTO). The shipyard was closed in 1949.
Cantiere navale del Muggiano is a defunct Italian shipbuilding company. Founded in 1883 in Muggiano, it was combined with the Cantiere navale di Ancona into the Officine e Cantieri Liguri-Anconetani in 1899 and then, together with the Cantiere navale di Palermo, amalgamated into Cantieri Navali Riuniti (CNR) on 31 January 1906. FIAT-San Giorgio, owners of the adjacent submarine shipyard, purchased the shipyard from CNR in 1913 to increase their production capacity. Gio. Ansaldo & C. bought out FIAT in 1918 and the company was renamed Ansaldo-San Giorgio. Ansaldo was forced to sell its half to Attilio Odero in 1921. Once Odero gained control of the Vickers-Terni armament works in 1927, he amalgamated the shipyard with his other facilities into Odero-Terni. He acquired the Cantiere navale fratelli Orlando in 1929 and renamed the company, Società per la Costruzione di Navi, Macchine ed Artiglierie Odero-Terni-Orlando (OTO). It was merged into Fincantieri in 1984.
Cantiere navale di Ancona is an Italian shipyard.
Cantiere navale di Palermo is a shipyard in Palermo, Sicily. It was founded in 1897 by Ignazio Florio Jr., grandson of Vincenzo Florio Sr.. Construction was protracted and Florio was forced to sell his stake in the shipyard to Attilio Odero in 1905. It was then amalgamated with the two shipyards belonging to Officine e Cantieri Liguri-Anconetani into Cantieri Navali Riuniti (CNR) on 31 January 1906. In 1925 CNR was renamed as Cantieri Navali del Tirreno after it gained control of the Cantiere navale di Riva Trigoso. After completing bankruptcy proceedings in August 1973, it came under the control of Italcantieri and then Fincantieri in 1984.
Ugolino Vivaldi was one of twelve Navigatori-class destroyers built for the Regia Marina between the late 1920s and the early 1930s.
Antoniotto Usodimare was one of a dozen Navigatori-class destroyers built for the Regia Marina in the late 1920s. Completed in 1929, she served in World War II.
Luca Tarigo was one of a dozen Navigatori-class destroyers built for the Regia Marina in the late 1920s. Completed in 1929, she served in World War II.
Emanuele Pessagno was one of a dozen Navigatori-class destroyers built for the Regia Marina in the late 1920s. Completed in 1930, she served in World War II.
Lanzerotto Malocello was one of a dozen Navigatori-class destroyers built for the Regia Marina in the late 1920s. Completed in 1930, she served in World War II.
Cesare Battisti was one of four Sauro-class destroyers built for the Regia Marina in the 1920s. Completed in 1927, she served in World War II.
Nazario Sauro was the lead ship of her class of four destroyers built for the Regia Marina in the 1920s. Completed in 1926, she served in World War II.
Ametista was the lead ship of her class of a dozen submarines, the second sub-class of the 600 Series of coastal submarines built for the Regia Marina during the early 1930s.
Zaffiro was one of a dozen Sirena-class submarines, the second sub-class of the 600 Series of coastal submarines built for the Regia Marina during the early 1930s.
