Battleship, Yamato class, the largest battleship ever built. Length: 263 metres Beam : 36.9 metres Draft : 11 metres Propulsion : 12 kampon boilers, driving 4 steam turbines. Displacing 72,800tonnes at full load. Armed with nine 46cm (18.1inch) main guns. Yamato's keel was laid down at the Kure naval Arsenal in Hiroshima in 1937.