HMSAS Parktown was a minesweeping whaler of the South African Naval Services that was sunk during the Second World War. She was built as the whaler Southern Sky for the Southern Whaling and Sealing Company in 1929 and sold in 1936 to the Union Whaling Company, acquiring the new name Sidney Smith. She was requisitioned on 8 August 1940 as HMSAS Parktown and was converted to sweep magnetic mines. She arrived at Tobruk on 10 June 1942 just in time to take part in the evacuation of Allied forces. She was the last ship to leave Tobruk harbour prior to its capitulation to German forces on 20 June 1942. Parktown embarked 60 troops and took a tug in tow outside the harbour. Her reduced speed led to her being attacked by Axis E-boats, most probably German E-boats from Derna. Gunfire from the motor