Could Great Lakes shipyards build modern escort carriers that could pass through the locks to the sea?
Short answerAn Izumo-sized example would be too long and too wide for the quoted locks; its shallower draft would not solve those limits.
NotesThousand-foot Lakers can operate within the Great Lakes, but an ocean-bound carrier must also pass through the connecting waterways. The comparison uses Izumo at about 814 feet long against a quoted 740-foot lock limit. Its beam of roughly 124 feet also exceeds the quoted 78-foot width. Its draft fits within the quoted limit, which cannot compensate for excessive length and beam. These dimensions rule out the Izumo-sized example; a smaller design remains unexplored.