How would adopting a three-fleet unit change the British Empire's navy?
Short answerBritain would have to balance full Home, Mediterranean, and Indian Ocean or Eastern fleets, increasing interwar capital-ship strength by at least half and adding cruisers and destroyers.
NotesThe existing balance between Home and Mediterranean commitments becomes a three-way allocation once the Indian Ocean is treated as a coequal fleet station. A nominal plan therefore demands real hulls: more capital ships, additional cruisers, and many more destroyers. Strategic geography translates directly into procurement totals.