Frontier was a 1,000 GRT Cargo ship that was built in 1922 as Cattaro by Memeler Schiffswerke, Lindenau & Co, Memel, Germany. After a sale in 1930 she was renamed Finkenau. In 1945, she was renamed Levensau and was seized later that year by the Allies at Brunsbüttel, passed to the Ministry of War Transport (MoWT) and was renamed Empire Convoy. She was allocated to the Netherlands in 1946 and renamed Grebburg. She was sold into merchant service in 1947 and renamed Echo. A sale to South Africa in 1952 saw her renamed Frontier. The ship served until 1957 when she ran aground and broke up.