How treaty-era industrial contraction favored quadruple turrets

Eagle's extra Vickers anti-aircraft guns introduce a wider lesson about using what is available while better weapons are still entering production. Interwar treaty limits and reduced warship orders allowed yards to retain repair skills, but not the immense turret-building capacity maintained before and during the First World War. When rearmament accelerated, the number of mountings that factories could build became a bottleneck in its own right. Three quadruple turrets put twelve guns on a battleship where four triple turrets would be needed for the same total, while each individual mounting occupied broadly comparable factory space. Quadruple mountings could therefore improve industrial throughput alongside their effects on firepower, reliability, and ship layout.