Naval Historywith Dr. Alex

Q&A · 46:53-49:31

Royal Navy AA conversions in a war delayed to 1942

Three more peacetime years would spread 4.5-inch guns through destroyers, sloops, and converted anti-aircraft cruisers without making every Royal Navy secondary battery uniform.

4.5-inch Guns5.25-inch GunsAnti-Aircraft GunsBlack Swan Class SloopsC Class CruisersDanae Class Light CruisersDestroyersDido Class Light CruisersEgret Class SloopsKing George V Class Battleships (1939)Light CruisersRoyal NavyShip RefitsTribal Class Destroyers (1936)
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Question

If the war were delayed until 1942, how far could Royal Navy anti-aircraft standardisation proceed?

Short answer

Destroyers, sloops, and some converted cruisers could receive many more 4.5-inch guns, but ships requiring heavier dual-purpose batteries would retain 5.25-inch weapons and complete uniformity would remain impractical.

Notes

A war delayed to 1942 would give the existing conversion programme time to reach more ships. Plans already covered Tribal-class and other destroyers, Black Swan and Egret-class sloops, and some converted anti-aircraft cruisers. Dido-class cruisers and King George V-class capital ships would probably retain 5.25-inch guns because their dual-purpose batteries also needed greater anti-ship hitting power. Converted C- and D-class cruisers could receive 4.5-inch weapons, and a future 9.2-inch heavy cruiser might use them as secondaries. Ordinary light-cruiser conversions would sit near the end of the queue and might not finish until 1945 even if peace lasted that long. The result would be much broader standardisation around the 4.5-inch gun, but not a single calibre imposed on every ship regardless of role.