The Japanese plan includes having a dual design centre in Japan and Australia, as well as a training plan under which Australian shipbuilders initially would be trained in Kobe, Japan, before constructing the sub*marines in Australia. If an all-Australian build was chosen by the government, Japan would start with a “mock-up” boat, called Boat Zero, in Australia to allow shipbuilders to learn how to build the new design, rather than make teething mistakes on the first boat of the fleet, as so often happens in first-of-type submarine builds. If a hybrid option were chosen, whereby Japan built the first boat in Japan and the rest in Australia, there would be no need for a mock-up boat in Australia."