Russian battleship Petropavlovsk (1911)

Kronstadt Rebellion

Volkhov River, and served as a stationary training ship

long at the waterline and 181.2 meters (594 ft 6 in) long overall. She had a beam of 26.9 meters (88 ft 3 in) and a draft of 8.99 meters (29 ft 6 in), 49 centimeters (1 ft 7 in) more than designed. Her displacement was 24,800 tonnes (24,408 long tons) at load, over 1,500 t (1,476 long tons) more than her designed displacement of 23,288 t (22,920 long tons).^[1]

kW), but they produced 52,000 shp (38,776 kW) during her sister Poltava's full-speed trials on 21 November 1915 and gave a top speed of 24.1 knots (44.6 km/h; 27.7 mph). Twenty-five Yarrow boilers provided steam to the engines at a designed working pressure of 17.5 standard atmospheres (1,770 kPa; 257 psi). Each boiler was fitted with Thornycroft oil sprayers for mixed oil/coal burning. They were arranged in two groups. The forward group consisted of two boiler rooms in front of the second turret, the foremost of which had three boilers while the second one had six. The rear group was between the second and third turrets and comprised two compartments, each with eight boilers. At full load she carried 1,847.5 long tons (1,877 t) of coal and 700 long tons (711 t) of fuel oil and that provided her a range of 3,500 nautical miles (6,500 km; 4,000 mi) at a speed of 10 knots (19 km/h; 12 mph).^[2]

75-millimeter (3.0 in) were added to the roofs of the end turrets during the war.^[4] Four 17.7-inch (450 mm) submerged torpedo tubes were mounted with three torpedoes for each tube.^[3]

laid down on 16 June 1909 and she was launched on 22 September 1911. She entered service on 5 January 1915, six months after the start of World War I, when she reached Helsinki and was assigned to the First Battleship Brigade of the Baltic Fleet. Petropavlovsk and her sister Gangut provided distant cover for minelaying operations on 10–11 November and 6 December 1915. She saw no action of any kind during 1916. Her crew joined the general mutiny of the Baltic Fleet on 16 March 1917, after the idle sailors received word of the February Revolution in Saint Petersburg.^[5] On 26 October, Petropavlovsk ran aground. She was refloated on 13 November with assistance from Gangut.^[6] The Treaty of Brest-Litovsk required the Soviets to evacuate their naval base at Helsinki in March 1918 or have their ships interned by newly independent Finland even though the Gulf of Finland was still frozen over. Petropavlovsk and her sisters led the first group of ships on 12 March and reached Kronstadt five days later in what became known as the "Ice Voyage".^[5]

Kronstadt Rebellion of March 1921. After it was bloodily crushed she was renamed Marat to honor the French revolutionary leader Jean-Paul Marat on 31 March 1921.^[11] By 1922 her primary rangefinder had been moved to a platform on the foremast and she mounted three 3-inch "Lender" AA guns each on the roofs of the fore and aft turrets.^[12]

rangefinders, was positioned at the top of the tubular foremast. An 8-meter (26 ft) Zeiss rangefinder was also added on the rear superstructure. The top of the forward funnel was lengthened by about 2 meters (6 ft 7 in) and angled backwards in an attempt to keep the exhaust gases away from the control and gunnery spaces. A derrick was added to the mainmast to handle a KR-1 flying boat imported from Germany that was stored above the third turret. No aircraft catapult was fitted so the aircraft had to take off and land on the water. A forecastle was added to the bow, which was also given much more sheer and flare to improve her sea-keeping abilities. Her turrets were overhauled, her guns replaced and new 8-meter rangefinders were installed on every turret. Her boilers were converted to only burn fuel oil and the more powerful boilers allowed the forward three boilers to be removed. The space freed up was used for anti-aircraft ammunition and various control spaces. The cruising turbines were also removed which simplified the ship's machinery at a small cost in power. These changes increased her displacement to 26,170 tonnes (25,757 long tons) at full load and her overall length to 184 meters (604 ft). Her metacentric height increased to 1.93 meters (6 ft 4 in) from her designed 1.76 meters (5 ft 9 in) mainly because she now carried much of her fuel in her double bottom rather than in coal bunkers high on the sides of the ship. More weight was added to her before World War II, including an increase in the thickness of her turret roofs to 152 millimeters (6.0 in), that decreased her metacentric height to only 1.7 meters (5 ft 7 in). This was unsatisfactory and plans were made to reconstruct her again, but they were cancelled when the Germans attacked in 1941.^[13]

high explosive shells before the Gulf of Finland iced over.^[15] In early 1940 her anti-aircraft armament was reinforced. She exchanged her elderly 3-inch "Lender" guns for modern 76.2-millimeter (3 in) 34-K guns and two twin-gun 76.2 mm 81-K mounts were mounted on her quarter deck. The magazines for these guns were situated in the rearmost casemates on each beam, which lost their 120 mm guns. At some point six automatic 37-millimeter (1.5 in) 70-K guns were also added. These additions boosted her displacement to 26,700 tonnes (26,278 long tons) at full load.^[16] She sailed to Tallinn shortly after the Soviets occupied Estonia, although she returned to Kronstadt on 20 June 1941, two days before the German invasion of Russia began.^[15] Marat opened fire on troop positions of the German 18th Army from the Leningrad Sea Canal on 8 September. She was lightly damaged by German 15-centimeter (5.9 in) guns on 16 September.^[17]

Oberleutnant Hans-Ulrich Rudel of III./StG 2, but Rudel dropped only one of the two bombs.^[19] The rear part of the ship was later refloated and she was used as a floating battery although all of her 120 mm guns were removed. Initially only the two rearmost turrets were operable, but the second turret was repaired by the autumn of 1942. She fired a total of 1,971 twelve-inch shells during the siege of Leningrad.^[18] In December 1941 granite slabs 40–60 millimeters (1.6–2.4 in) thick from the nearby harbor walls were laid on her decks to reinforce her deck protection. Another transverse bulkhead was built behind frame 57 and the space between them was filled with concrete to prevent her sinking if the original bulkhead was ruptured.^[20]

river, on 28 November 1950 and served as a stationary training ship until stricken on 4 September 1953. The ship was subsequently broken up.^[21]