Shipyards could build aircraft, locomotives, guns, and tanks

Could shipyards and dockyard industry build tanks and artillery, or did they diversify only during wartime?

Major yards were diversified heavy-engineering firms and routinely pursued other products when markets existed, giving them the capacity to build weapons and vehicles in wartime.

Firms such as Armstrong Whitworth and Vickers were broad heavy-engineering businesses rather than narrowly specialised ship assemblers. Their works produced aircraft, armour, bridges, cars, cranes, locomotives, guns, tanks, and ships. Existing foundries, machine shops, design skills, and large-scale material handling made diversification technically plausible. Firms followed profitable markets in peacetime and could redirect capacity toward wartime needs. The health of a shipbuilding region therefore affected a much wider defence-industrial base.