Brazil's Rio de Janeiro design choices show how gun cost could outweigh even the expense of lengthening a hull. A twelve-inch ship might no longer match the leading battle line, yet could still be sold as a second-class dreadnought. This revives a category familiar from late pre-dreadnought practice instead of assuming every buyer can fund the new standard. The classification connects tactics with export markets, national budgets, and the survival of apparently obsolete design ideas.
Notable Point · 41:37-43:25
A market for second-class dreadnoughts
If 14-inch, 24-knot ships define the first-class dreadnought, smaller navies may preserve a cheaper second-class battleship category rather than abandon capital ships.