
The United States built 2,710 Liberty ships between 1941-45, averaging 1.5 a day.
Made with antiquated but easily manufactured technology, they were built in record time. Each ship took an average of just 42 days to complete.
The ships were lightly armed, but one notable example, the SS Stephen Hopkins, managed to fight a cargo raider to mutual destruction.
Currently, only four remain. Three are museums, while the fourth is a landlocked canning facility.