The Royal Navy is judged to have made most of the right stockpiling choices for a later war, so the scenario concentrates on additions argued for at the time. It limits decisions to 1918-23 and requires ideas that a contemporary officer might plausibly have advanced. The exercise cannot rewrite the naval treaties or retain every battlecruiser under an invented mission. Each asset needs a legitimate role, and any concealment needs a plausible justification. These constraints test whether the Navy could preserve useful capacity through institutional foresight without relying on hindsight.
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Planning postwar reserves within treaty limits
The exercise begins from the view that the Royal Navy largely chose its real reserves well, then asks what a 1918-23 officer could plausibly add, retain, or conceal within treaty rules.