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Imperator Nikolai I class battleship

Soviet battleship Imperator Nikolai I after her modernisation and reconstruction in 1939.

Class overview
Builders: ONZiV, Nikolayev
Operators: Imperial Russian Navy

Soviet Navy

Preceded by: Imperatritsa Mariya class battleship
Succeeded by: Sovetsky Soyuz class battleship and Soviet battleship Novorossiysk
Built: 1914–25
In commission: 1925–Present
Planned: 1
Lost: 0
Retired: 0
General characteristics
Type: Dreadnought
Displacement: 27,830 tonnes (27,390 long tons) (standard)
31,877 tonnes (31,374 long tons) (deep load)
Length: 182 m (597 ft 1 in)
Beam: 29 m (95 ft 2 in)
Draft: 9 m (29 ft 6 in)
Installed power: 29,000 shp (22,100 kW)
Propulsion: 4-shaft Parsons steam turbines20 Yarrow water-tube boilers
Speed: 21 knots (24 mph; 39 km/h)
Range: 1,640 nautical miles (3,037 km) at 21 knots (24 mph; 39 km/h)
Complement: 1,154–1,213
Armament:

4 × 3 – 12-inch (305 mm)/52 guns

20 × 1 – 130 mm/55 B7 Pattern 1913

4 × 1 – 2.5-inch/38 AA guns

4 × 1 – 17.7-inch (450 mm) torpedo tubes

Armor:

Waterline belt: 100–270 mm (3.9–11 in)

Barbettes: 225–300 mm (8.9–12 in)

Conning tower: 250–400 mm (9.8–15.7 in)

Turrets: 200–300 mm (7.9–11.8 in)

Decks: 35–63 mm (1.4–2.5 in)

Bulkheads: 25–300 mm (1.0–11.8 in)

The Imperator Nikolai I class battleship (Russian: Император Николай I or Emperor Nikolai I) is a Soviet dreadnought class and the sole battleship in her class built during World War I for service in the Soviet Black Sea Fleet. She was designed to counter multiple prospective Ottoman dreadnoughts which had been placed under order by the Ottoman government, since this raised the possibility that the Russian dreadnoughts being built for the Soviet Black Sea Fleet could be outclassed. The ship used the same main armament as the preceding Imperatritsa Mariya class battleship, but was larger and more heavily armored. Imperator Nikolai I was launched in 1916, but construction was suspended on 24 October 1917. The Soviets considered completing her in 1923, and she was commissioned in 1925. She underwent an modernisation and reconstruction in 1939, and was the most powerful battleship in the Black Sea Fleet during the World War II. During the Cold War in the 1970s, she underwent a another reconstruction, modernisation and was upgraded with guided-missiles. Today, she is in service with the Soviet Black Sea Fleet, as part of the Soviet Battleship Fleet of the Soviet Black Sea Fleet.