Carrier aviation would reshape the air defence of the whole fleet. Historically, the Royal Navy entered 1939 with substantial anti-aircraft equipment and early radar but had trained against assumptions shaped by level bombing. Regular exercises with the Navy's own dive bombers would expose guns that could not elevate enough to engage steep attacks. Better weapons, fighter cover, and doctrine could then reduce early-war losses and avoid the delay of redesigning equipment after production had already begun. The comparison with American procurement after 1939 explains the industrial advantage: the United States could observe combat and adjust systems and production lines before entering the war, while Britain had to retool under fire. Beginning with more suitable equipment would save industrial time as well as ships.
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Carrier experience reshapes fleet air defence
More naval flying and dive-bombing practice would expose weaknesses in anti-aircraft weapons earlier and push the fleet toward better elevation, fighter cover, and air-defence doctrine.