SS Lancing was a Norwegian whale factory ship, originally the British merchant ship Knight Errant. The ship passed through a number of owners, being named Rio Tiete, Omsk, Calanda, and Flackwell at different stages in her career. She was sunk off Cape Hatteras on 7 April 1942 by the GS U-552.
Construction and early career
Knight Errant was built by Charles Connell and Company, Scotstoun and launched on 11 December 1897, being completed the following year. She entered service with Knight Steamship Company, Liverpool and sailed for them until being sold in 1913 to the European & Brazilian Shipping Company, of London. The ship was renamed Rio Tiete in 1914 and spent part of the First World War under the British flag. She was sold to Dobroflot in 1915, the Russian Volunteer Fleet Association, and was renamed Omsk. With the Russian Revolution in 1917 and the Russian exit from the war, Omsk was seized by the British Shipping Controller and operated on their behalf by the Royal Mail Steam Packet Company. She was then sold on again, in 1921, to the London & Foreign Maritime Trading Company, and then to the London Steamship & Trading Corporation. By now renamed Calanda, she spent only a few years on this service, and was sold once more to D L Flack & Son, London in 1923, being renamed Flackwell. Her final sale took place in 1925, when she was acquired by the Norwegian firm of Hvalfanger A/S Globus. They undertook her conversion to a whale factory ship and assigned her to be operated by Melsom & Melsom,