The design was modified to fit American production methods , and five new shipyards were built to give the shipbuilding industry capacity .
In 1939 , they asked the United States to help solve the problem , bringing a ship design that they wanted built .
The design was modified to fit United States production methods , and five new shipyards were built to give the shipbuilding industry capacity .
In 1939 , they asked the United States to help solve the problem , bringing a ship design that they wanted built .