Her main armament consisted of five 53.3-cm (21-inch) torpedo tubes; four in the bow, and a fifth in the stern. She could carry a total of 14 torpedoes – five in the torpedo tubes, seven reloads inside the pressure hull, and a further two in water-tight canisters outside the pressure hull. The boat was fitted with an 8.8-cm C/35 deck gun (with around 150 rounds of ammunition), and a 2-cm Flak 30 anti-aircraft gun with a 28-cm stereoscopic rangefinder. She also carried several machine guns.