SS Tjisalak was a 5,787-ton Dutch freighter with passenger accommodation built in 1917 for the Java-China-Japan Lijn and used by the Allies during World War II to transport supplies across the Indian Ocean between Australia and Ceylon. On 26 March 1944, she was torpedoed and sunk by the Japanese submarine I-8 while traveling unescorted. The freighter's crew were subsequently massacred in an infamous naval war crime.