I know I watched the series as a kid, but I seem to remember the Yamato starting off as a regular sea based cruiser with a mini sub that launched from the belly. It was later converted to a space cruiser after an attack by the alien race. Am I remembering right (it's been a while) or have I overdosed on crack again?
They not converted - they builded a new spaceship based on WWII japanese battleship Yamato design. In theory, the spaceship have the same size (265m) and same main cannons (46 and 15,5 cm). The ship size is OK : in 1/500 scale have 53cm, but the cannons are out of scale.