The Liberty ships were the last major steamship class equipped with reciprocating engines. The last Victory ships had already been equipped with marine diesels, and diesel engines superseded both steamers and windjammers soon after World War Two. Most steamers were used up to their maximum economical life span, and no commercial ocean-going steamers with reciprocating engines have been built since the 1960s.
The Liberty ships were the last major steamship class equipped with reciprocating engines The last Victory ships had already been equipped with marine diesels and diesel engines superseded both steamers and windjammers soon after World War Two Most steamers were used up to their maximum economical life span and no commercial ocean-going steamers with reciprocating engines have been built since the 1960s