French battleship Jean Bart ( 1911 ) Jean Bart was the second ship of the s , the first dreadnoughts built for the French Navy . She was completed before World War I as part of the 1910 naval building programme . She spent the war in the Mediterranean and helped to sink the Austro - Hungarian protected cruiser on 16 August 1914 . She spent most of the rest of 1914 providing gunfire support for the Montenegrin Army until she was torpedoed by the submarine on 21 December . Even with three compartments flooded , she was able to steam to Malta on her own for repairs that required three and a half months . Upon her return she spent the remainder of the war participating in the Otranto Barrage , in the Adriatic . After the end of World War I she and her sister ship were sent to the Black Sea to support Allied troops in the Allied intervention in the Russian Civil War . " Jean Bart " s crew mutinied out of sympathy for the Bolsheviks , but the mutiny was put down and she returned to the Mediterranean in 1920 . She was partially modernized twice during the 1920s , but was deemed in too poor condition to be refitted again in the 1930s . Therefore she was renamed " Océan " , disarmed and hulked in 1936 and became a harbour training ship in Toulon . The Germans captured her intact when they occupied Toulon in 1942 and used her for testing large shaped charge warheads . She was sunk by Allied bombing in 1944 , but was raised and scrapped in 1945 . Description . " Jean Bart " was long overall . She had a beam of and at full load a draft of at the bow . She displaced at standard load and at full load . She proved to be rather wet in service as she was bow - heavy because of her superimposed turrets forward . " Jean Bart " had four propellers powered by four Parsons direct - drive steam turbines , rated at ; twenty - four Belleville water - tube boilers provided steam for her turbines . These boilers were coal - burning with auxiliary oil sprayers . She had a designed speed of . She carried up to of coal and of oil and could steam for at a speed of . " Jean Bart " s main armament consisted of twelve Mle 1910 45 - calibre guns mounted in six twin gun turret s , with two turrets superimposed fore and aft , and one on each flank of the ship . For anti - torpedo boat defence she carried twenty - two Mle 1910 guns , which were mounted in casemate s . Four Modèle 1902 Hotchkiss gun s were fitted , two on each beam . She was also armed with four submerged Modèle 1909 torpedo tube s with twelve torpedoes . " Jean Bart " s waterline armoured belt extended well below the waterline as the French were concerned about protection from underwater hits . Her main armour was also thinner than that of her British or German counterparts , but covered more area . It was thick between the fore and aft turrets and tapered to towards the bow and stern . It extended below the normal waterline . Above the main belt was another belt , 180 mm thick , that covered the sides , and the secondary armament , up to the forecastle deck , deep , between the fore and aft turrets . The conning tower had armour thick . The main gun turrets had of armour on their faces , on their sides and roofs thick . Their barbettes had of armour . There was no anti - torpedo bulkhead although there was a longitudinal bulkhead abreast the machinery spaces that was used either as a coal bunker or left as a void . Career . " Jean Bart " was built by the Arsenal de Brest at Brest . Her keel was laid down on 15 October 1910 and was launched on 22 September 1911 . She was completed on 19 November 1913 and finished her trials before World War I began the following year . " Jean Bart " escorted " France " , which was carrying the President of the French Republic , Raymond Poincaré , on a state visit to Saint Petersburg , Russia in July 1914 . They were returning from Russia when World War I began , but made it to France without encountering German ships . Shortly after the start of the war , the commander of the Allied naval forces in the Mediterranean decided to sweep the Adriatic , to surprise the Austrian vessels enforcing a blockade of Montenegro . The Anglo - French force , which included " Jean Bart " , succeeded in cutting off and sinking the Austro - Hungarian protected cruiser " Zenta " in an engagement off Antivari on 16 August 1914 , although her accompanying destroyer managed to escape . " Jean Bart " spent most of the rest of 1914 providing gunfire support for the Montenegrin Army until she was torpedoed by the submarine off Sazan Island on 21 December . The one torpedo struck her in the wine store just before the forward magazine . She was able to steam to Malta on her own for repairs that required three and a half months , but this attack forced the battleships to fall back to either Malta or Bizerte . After the French occupied the neutral Greek island of Corfu in 1916 the ships moved forward to Corfu and Argostoli , but their activities were very limited as many of their crews were used to man anti - submarine ships . In 1918 , she served off Greece . Before the end of the war she was fitted with seven Mle 1897 anti - aircraft ( AA ) guns in single mounts . These guns were adaptations of the famous French Mle 97 75 mm field gun . In April 1919 , while " Jean Bart " was helping to defend Sevastopol from the advancing Bolsheviks , her crew mutinied , along with that of the " France " , but the mutiny collapsed when Vice - Admiral Jean - Françoise - Charles Amet agreed to meet the mutineers ' main demand to take the ships home . Three crewmen were sentenced to prison terms upon her return , although the sentences were commuted in 1922 as part of a bargain between Prime Minister Raymond Poincaré and the parties of the Left . The ship returned to Toulon in 1920 and received the first of her two refits between 12 October 1923 and 29 January 1925 . This included replacing one set of boilers with oil - fired boilers , trunking together her two forward funnels , increasing the maximum elevation of the main armament from 12° to 23° , removal of her bow armour to make her more seaworthy , the installation of a fire - control director , with a rangefinder , atop the new tripod foremast , and the replacement of her Mle 1897 AA guns with four Mle 1918 guns and 24 machine guns . " Jean Bart " was refitted again between 7 August 1929 and 29 September 1931 . This was much more extensive than her earlier refit as another set of boilers was converted to oil - firing , her direct - drive cruising turbines were replaced by geared turbines and her fire - control systems were comprehensively upgraded . A large cruiser - type fire - control director was added atop the foremast with a 4 . 57 - m coincidence rangefinder and a stereo rangefinder . The rangefinder above the conning tower was replaced by a duplex unit carrying two 4 . 57 - m rangefinders and another 4 . 57 - m rangefinder was added in an armoured hood next to the main mast . Two directors for the secondary guns were added on the navigation bridge , each with a coincidence rangefinder . A rangefinder was added to the roof of ' B ' turret , the second one from the bow . Her Mle 1897 AA guns were exchanged for Mle 1918 guns and they were provided with three rangefinders , one on top of the duplex unit on the conning tower , one on ' B ' turret and one in the aft superstructure . Her condition was poor enough that she was not thought to be worth the expense of a third refit like those her sisters were given . She was hulked , disarmed and became a harbour training ship in 1936 . She was renamed " Océan " that year to free her name for use by the new then being constructed . The new " Océan " was captured intact by the Germans on 27 November 1942 , the day the French Fleet was scuttled . The Germans used her for experiments with very large shaped charge warheads as delivered by the Mistel composite aircraft . She was sunk by Allied aircraft in 1944 and later raised for scrapping beginning on 14 December 1945 .