German capital-ship capacity depended on more than slipways

How many 25,000-ton ships could Germany have laid down in the mid-1930s?

Perhaps six could be under construction, but engines, guns, skilled labor, and deteriorated infrastructure would make four at a time more sustainable.

Versailles-era constraints had left German shipbuilding infrastructure underdeveloped, and growing design ambitions forced repeated upgrades. Cranes, armor movement, trained workers, engines, and gun manufacture were separate bottlenecks. Roughly six yards might take ships of the proposed size, while machinery and gun production could sustain only about four at once. A staggered programme could still lay down pairs at intervals.