Reduced pressure in the Atlantic and Mediterranean could release carriers, Renown, or Nelson-class ships for an Indian Ocean reserve. That fleet could deter Japan while remaining available to reinforce the Mediterranean. Its position would keep it beyond Italian submarine reach and make a surprise Japanese approach more demanding. A route around Australia would impose substantial fuel and force-allocation problems. Japan would have to account for that reserve while planning operations elsewhere, although its precise response remains uncertain.
Notable Point · 3:16:04-3:21:04
An Eastern Fleet becomes a more credible deterrent
If Atlantic and Mediterranean pressures ease, Britain can hold more useful carrier and capital-ship strength in the Indian Ocean, complicating Japanese planning.