1918 Concrete ship shipyard stell construction United States Hog Island Philadelphia, Pennsylvania,
Hog Island in Philadelphia, Pennsylvania, was the first shipyard ever built for mass production of ships from fabricated parts and sub-assemblies, produced at dozens of subcontractors. It had 50 shipways, seven wet docks and a holding basin.
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Photo credit: © SOTK2011 / Alamy / Afripics
License: Licensed
Model Released: No
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