British sloop HMS Rochester, corvette HMS Mignonette, and corvette HMS Balsam, with the help from a US Navy PBY Catalina aircraft, sank German submarine U-135 in the Atlantic Ocean; 5 German crew were killed, 41 survived. Off the Portuguese island of Madeira, US Navy Composite Squadron 29 TBF Avenger torpedo bomber sank German submarine U-509; all 54 aboard were killed. Also off Madeira, German submarine U-135 damaged transport Twickenham. U-572 sank sailing ship Gilbert B. Walters off Venezuela. In the South Atlantic, 620 miles east of Rio de Janeiro, Brazil, U-172 sank transport Harmonic at 2116 hours; 1 was killed, 38 survived.
