Capital ships and tonnage for a three-fleet Royal Navy

How many capital ships and how much treaty tonnage would Britain need to sustain three principal fleets?

About twenty ships is the bare minimum, while roughly twenty-five to twenty-seven better supports three fleets with six to nine ships each and some operational reserve.

Six capital ships per fleet plus a small reserve makes twenty hulls the minimum credible structure, while eight or nine per theater would be healthier. A roughly 650,000-ton British allowance could support about twenty or twenty-one 31,000-ton ships, showing how treaty ratios and individual displacement constrain the global plan.