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Kirov-class cruiser
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===Armament=== The main armament consisted of three electrically powered MK-3-180 triple turrets with three 57-[[caliber (artillery)|calibre]] [[180mm Pattern 1931-1933|180 mm ''B-1-P'' guns.]] The turrets were very small to fit them into the hull space available and were so cramped that their rate of fire was much lower than designed (only two rounds per minute instead of six). The guns were mounted in a single cradle to minimize space and were so close together that their dispersion was very high because the muzzle blast from adjacent guns affected each gun. The turrets weighed approximately {{convert|236|to|247|t|LT|0}}, and the guns could be depressed to β4Β° and elevated to 48Β°. The guns fired {{convert|97.55|kg|lb|adj=on}} projectiles at a [[muzzle velocity]] of {{convert|900|-|920|m/s|ft/s|abbr=on}}; this provided a maximum range of around {{convert|38000|m|yd|abbr=on}}, depending on ammunition and gun type.<ref>{{cite web|url=http://www.navweaps.com/Weapons/WNRussian_71-57_m1932.htm|title=Russian 180 mm/60 (7.1") B-1-K Pattern 1931 180 mm/57 (7.1") B-1-P Pattern 1932 180 mm/56 Pattern 1933|date=7 October 2006 |access-date=2009-08-05}}</ref> Normally, 100 rounds per gun were carried, although an additional four rounds per gun could be carried at overload by the Project 26 ships only.<ref name=y4/> The secondary armament consisted of six single 56-caliber {{convert|100|mm|adj=on}} ''B-34'' [[Anti-aircraft warfare|anti-aircraft]] guns with 325 rounds per gun fitted on each side of the rear funnel in all ships except the Project 26bis2 which used eight single 52-caliber {{convert|85|mm|adj=on}} ''90-K'' guns with 300 rounds per gun when the ''B-34'' program ran into problems. Light AA guns initially consisted of six semi-automatic [[45 mm anti-aircraft gun (21-K)|45 mm ''21-K'']] AA guns with 600 rounds per gun and four [[DShK|DK]] {{convert|12.7|mm|in|adj=on}} machine guns, with 12,500 rounds per gun, but were significantly increased in service. The Project 26bis ships carried nine ''21-K'' mounts and the Project 26bis were built with an additional ten fully automatic [[37 mm automatic air defense gun M1939 (61-K)|{{convert|37|mm|adj=on}} ''70-K'']] AA guns with a thousand rounds per gun. Over the course of World War II most, if not all, of the 45 mm guns were replaced by 37 mm guns and one or two [[Lend-Lease]] quadruple [[Vickers .50 machine gun]] MK III mounts were fitted to the ships in the Baltic and Black Seas, although each ship varied in its anti-aircraft suite.<ref>Yakubov and Worth, pp. 84, 86-7</ref> Six {{convert|533|mm|adj=on}} ''39-Yu'' torpedo tubes were fitted in two triple mountings; these tubes could be individually adjusted to spread out their salvos. ''Molotov'' and ''Kaganovich'' replaced their launchers with the more-modern ''1-N'' mount during the war. A total of 96 ''KB'' or 164 ''Model 1912'' [[Naval mine|mines]] could be carried by the first pair of ships. A pair of [[depth charge]] racks were mounted as well as four ''BMB-1'' depth charge throwers. Twenty large ''BB-1'' and thirty small ''BM-1'' depth charges were carried although no [[sonar]] was fitted for the Project 26 and Project 26bis ships. They did mount the ''Arktur'' underwater acoustic communication system. ''Kalinin'' and ''Kaganovich'' received the Lend-Lease ''ASDIC-132'' system, which the Soviets called ''Drakon-132'', as well as the experimental Soviet ''Mars-72'' sonar system.<ref name=y8>Yakubov and Worth, p. 88</ref> The Project 26 ships were fitted with the ''Molniya'' fire control system for their main guns which included the ''TsAS-2'' mechanical computer and the ''KDP3-6'' director. Each turret and the director had ''DM-6'' rangefinders which allowed multiple targets to be engaged using a combination of local and central fire control. The four later ships had an improved ''Molniya-ATs'' fire control system which could accept data from spotter aircraft. The anti-aircraft armament was controlled by the ''Gorizont-1'' system with a ''SO-26'' computer, ''Gazon'' vertical [[gyroscope]] and a pair of ''SPN-100'' directors on each side of the superstructure. Each director had a fully stabilized {{convert|3|m|ftin|abbr=on}} rangefinder. ''Voroshilov'' had ''SPN-200'' directors, but the Project 26bis ships used the ''Gorizont-2'' system. This had a more advanced ''Gorizont-2'' computer and ''Shar'' vertical gyroscope.<ref>Yakubov and Worth, p. 87</ref> The first Soviet ship to carry a [[radar]] was ''Molotov'' which was given a ''Redut-K'' air warning system in 1940, which she used for the entire war. Lend-Lease radars equipped most of the other ships. The British Types 281, 291 and the American SG radars were used for air search. Main battery fire control radars were the British Types 284 and 285 while anti-aircraft fire control was provided by the Type 282 radar. Soviet-designed ''Yupiter-1'' and ''Mars-1'' gunnery radars were fitted in ''Molotov'' and ''Kalinin'' by 1944.<ref name=y8/>
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