I shouldn’t have said nuclear sub. France was to convert a nuclear sub platform into diesel-electric for Australia, and that has been a fiasco.
Reason: “Australia’s 12 new attack-class submarines – Australia’s largest military acquisition in its history – were originally slated to cost between $40 billion and $50 billion. According to the latest projections they will now cost about $90 billion to build and $145 billion to maintain over their life cycle. Despite the fact former prime minister Tony Abbott promised the first of the submarines would be in the water by the mid-2020s, it is now not scheduled to become operational until the mid-2030s.”