European shipyard capacity exists, but activating it takes investment

How full are European shipyards, and could they accept a sudden increase in warship orders?

Some surge space exists, but using it would require investment, maintenance, staffing, and double shifts rather than simply assigning new hulls to empty slots.

European yards may have more physical space than their current output suggests, but using that reserve would require refurbishment, extra shifts, and workers. Some areas earmarked for a surge programme have not been maintained well enough to use immediately. The British submarine example gives a theoretical capacity of six to eight boats under construction at once, compared with three to four normally being built. That estimate includes space used to hold sections for modular assembly; it is not a claim that six to eight completed submarines can be delivered each year. Paying to retain industrial space differs from funding its productive use. An emergency order cannot instantly turn reserved space into staffed shipbuilding capacity.