U-14s next war patrol was very successful, sinking five ships with a combined tonnage of 24,814, over half of her total tonnage sunk. U-14 departed from the submarine base at Cattaro on 20 August and headed through the Straits of Otranto, successfully evading the Otranto Barrage, and Allied blockade of the passageway between Italy and Albania. Heading into the Ionian Sea, von Trapp and U-14 sank the French steamer Constance on 23 August  northeast of Malta.
The U-14's next war patrol was highly successful, sinking five ships totaling 24,814 tons, accounting for over half of its total sunk tonnage. The U-14 departed from the submarine base at Cattaro on August 20 and navigated through the Straits of Otranto, successfully avoiding the Otranto Barrage and Allied blockade. Heading into the Ionian Sea, von Trapp and U-14 sank the French steamer Constance northeast of Malta.