The German torpedo boat T9 was one of a dozen Type 35 torpedo boats built for the Kriegsmarine (German Navy) during the late 1930s. Completed in July 1940, the boat participated in an abortive attempt to attack several convoys off the Scottish coast in November. T9 was placed in reserve in August 1941 and was reactivated in June 1942 for duties in France. She participated in an unsuccessful attempt to escort a blockade runner through the Bay of Biscay in early 1943 and was then transferred to the Torpedo School in September. In mid-1944 the boat returned to active duty and was assigned to the Baltic Sea area. She escorted a bombardment mission in November and was damaged by bombers in East Prussia in early 1945. T9 was sunk near Kiel, Germany, during an air raid on 3 May.