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  The origins of the Liberty Ship can be traced to a design proposed by the British in 1940. Seeking to replace wartime losses, the British placed contracts with US shipyards for 60 steamers of the Ocean class. These steamers were of simple design and featured a single coal-fired 2,500 horsepower reciprocating steam engine. While the coal-fired reciprocating steam engine was obsolete, it was reliable and Britain possessed a large supply of coal. While the British ships were being constructed, the US Maritime Commission examined the design and made alterations to lessen coast and speed construction.    This revised design was classified EC2-S-C1 and featured oil-fired boilers. The ship s designation represented: Emergency Construction (EC), a length of 400 to 450 feet at the waterline (2), steam-powered (S), and design (C1). The most significant change to the original British design was to replace much of the riveting with welded seams. A new practice, the use of welding decre

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