Shipbuilding potential depends on industrial land and recoverable infrastructure

How much useful shipyard capacity can disappear when yards are closed or repurposed?

A great deal: shipyard land can become real estate or factories, and reactivation faces ceilings until cranes, docks, and other infrastructure are rebuilt.

Unused yards lose both physical space and specialised supporting equipment. Britain could reactivate some infrastructure, but only up to a point before it had to build new cranes or alter docks. Published dock lengths can also hide previous modifications, which complicates simple capacity estimates. Some dry docks had been shortened with walls and fill, and extending them again required real construction work.