"The launch, like the ship itself, had to be concealed from prying eyes; the most important means of accomplishing this was a citywide air-raid drill staged on

"The launch, like the ship itself, had to be concealed from prying eyes; the most important means of accomplishing this was a citywide air-raid drill staged on the launch day to keep everyone inside their homes. Musashi was successfully launched on 1 November 1940, coming to a stop only 1 metre (3.3 ft) in excess of the hull's calculated 220 metres (720 ft) travel distance across the harbour. The entry of such a large mass into the water caused a 120 cm (3 ft 11 in) tsunami, which propagated throughout the harbour and up the local rivers, flooding homes and capsizing small fishing boats. http://en.wikipedia.org/wiki/Japanese_battleship_Musashi http://en.wikipedia.org/wiki/Japanese_battleship_Musashi