World of Warships Kearsarge hybrids appear in every major navy

What happens if the World of Warships hybrid Kearsarge appears at every major naval base in 1938?

Each navy adapts it to local needs, but the common technology windfall accelerates counterbuilding and disrupts prewar plans worldwide.

The counterfactual places the World of Warships Kearsarge at every major naval base in 1938, complete with its 30-knot hull, twelve 16-inch guns, flight deck, and technology. Each navy then responds according to its historical institutions, infrastructure, and doctrine. Britain and the United States would probably remove the flight deck and create fast battleships, while France and Russia might accept the hybrid more nearly as delivered and Italy could pursue a carrier conversion. Germany faces an interservice ownership struggle, whereas Japan gains a natural fast flagship for its carrier force. Radar, aircraft lifts, dual-purpose guns, and knowledge that every rival received the same ship would provoke redesign and counterconstruction. That simultaneous technology shock could disrupt prewar plans enough to delay the outbreak of war.