The Jean Bart was a French fast battleship and the second and final vessel of the Richelieu class, designed primarily in response to Italy’s Littorio-class battleships. Displacing approximately 37,250 long tons at standard load and reaching a full load of about 43,992 long tons, she measured roughly 247.85 meters (813 feet) in length, with a beam of 33.08 meters (108 feet 6 inches) and a maximum draft of 9.9 meters (32 feet 6 inches). Propelled by four Parsons geared steam turbines and six oil-fired boilers, Jean Bart could reach speeds up to 32 knots, with a range of 9,500 nautical miles at 15 knots, supporting her role as a fast and heavily armed vessel. Her main armament consisted of eight 380 mm (15-inch) guns arranged in two quadruple turrets placed superfiring forward of the superstructure, reflecting her design for powerful offensive capability. Secondary armament included nine 152 mm (6-inch) guns in three triple turrets, with a comprehensive anti-aircraft battery that evolved over her service life—initially twelve 100 mm guns, later augmented with additional 37 mm and 90 mm guns, and numerous machine guns, to improve her defenses against aircraft. Armor protection was substantial, with a belt thickness of 330 mm (13 inches), main turret armor of 430 mm (17 inches), and an armored deck of 170 mm (6.7 inches). Construction began in 1936 at the Chantiers de Penhoët shipyard, with her keel laid down in December of that year and launched in March 1940. Her completion was hampered by the outbreak of World War II and subsequent wartime disruptions. Notably, she was rushed to Casablanca in 1940 to escape advancing German forces, with only her forward turret installed and minimal armament. During Operation Torch in 1942, Jean Bart engaged American forces, notably exchanging fire with USS Massachusetts, but was badly damaged by dive bombers. Despite the damage, she remained afloat and was repaired as much as possible in Casablanca, serving as a training ship for the remainder of the war. Post-war, efforts to complete Jean Bart as a battleship or convert her into an aircraft carrier were rejected by the US Navy, which had no interest in finishing her. She was finally completed in 1955, with significant upgrades to her fire control and anti-aircraft systems, and served briefly as the flagship of the French fleet, participating in visits to Denmark and the United States. Her operational career was short-lived; she was decommissioned in 1957, used as a barracks ship, and ultimately scrapped in 1970. Despite her limited active service, Jean Bart played a crucial role as a testbed for French naval technology and remained a symbol of France’s interwar battleship ambitions.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.