Steel ships are often built in prefabricated sections, either from front to back or bottom to top, which are then welded and bolted together. https://en.wikipe

Steel ships are often built in prefabricated sections, either from front to back or bottom to top, which are then welded and bolted together. https://en.wikipedia.org/wiki/Shipbuilding#/media/File:HMS_Dauntless_D33.jpg https://en.wikipedia.org/wiki/Shipbuilding#/media/File:HMS_D... https://en.wikipedia.org/wiki/Shipbuilding#Modern_shipbuilding_manufacturing_techniques https://en.wikipedia.org/wiki/Shipbuilding#Modern_shipbuildi...