Yamato and her sister Musashi, were the largest and most powerful battleships ever built. The main armament were nine 46cm (18.1inch) triple turrets weighing 2500 tons each. Her overall length was 263m, with a 38.9m beam and a displacement of 72,809 tons. She entered service on 16 December 1941, in the Japanese Imperial Fleet's First Battleship Division. On the 25 December 1943 near Truk Island, she was hit by a torpedo from the US Submarine Skate causing damage which required dry dock repairs in Japan. She was sunk by US Carrier aircraft on 7 April 1945, erupting in a mushroom cloud that could be seen 200km away.