Naval staff priorities after the First World War

With present-day knowledge and control of a major navy's staff from 1918 through World War II, what policies would you pursue?

The proposed priorities include fast British capital ships, US carrier and research development, Italian and French infrastructure, and Japanese self-sufficiency in lubricants alongside broader pilot training.

These proposals assume a naval staff taking charge in 1918 with hindsight and remaining in control through World War II. The British proposal pursues fast capital ships and a 16.5-inch gun while seeking to avoid treaty limits. The US proposal accepts naval treaties with revised carrier allowances and sustained research funding. Italian and French proposals emphasise improving infrastructure so that later ships can be built more quickly. Japan's proposed priorities include self-sufficiency, improved infrastructure, and making lubricants from coal. The distinction between lubricants and fuel oil is explicit. A broader pilot-training system would also reduce dependence on a small elite of successful candidates.