Just 36 hours later, Wanklyn witnessed the Battle of the Duisburg Convoy. Captain William Gladstone Agnew led Force K—a flotilla of several destroyers—into a surface battle. Speeding up to attack any stragglers, Wanklyn engaged and sank the Italian "Maestrale"-class destroyer "Libeccio". Wanklyn attempted to engage a cruiser but hit an "Avieri"–class destroyer, which he claimed damaged. During the battle the gyro failed on one of the "Upholder" torpedoes, which ran in circles and came close to the "Upholder" before sinking.