Empire Duke was a cargo ship that was used during the Second World War in investigations into the metallurgical problems that Liberty ships were suffering from. Empire Duke was built in 1943 by J L Thompson & Sons Ltd, Sunderland, Co Durham for the Ministry of War Transport (MoWT). She was transferred to France in 1945 and renamed Lieutenant J Le Meur. She was sold to Morocco in 1949 and renamed Zelidja. In 1955, she was sold to Liberia and renamed Propontis, not being renamed after a sale in 1957. She served until 1966, when she was scrapped in Taiwan.