Q&A · 9:40:36-9:43:12

Why Great Lakes yards could not build an Izumo-sized carrier

Izumo's quoted length and beam exceed the locks' limits even though its draft would fit.

Question

Could Great Lakes shipyards build modern escort carriers that could pass through the locks to the sea?

Short answer

An Izumo-sized example would be too long and too wide for the quoted locks; its shallower draft would not solve those limits.

Notes

Thousand-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.