U-102 was fitted with five  torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one  SK C/35 naval gun, 220 rounds, and one  anti-aircraft gun.
U-102 was equipped with five  torpedo tubes (four at the bow and one at the stern), fourteen torpedoes, one  SK C/35 naval gun, 220 rounds, and one  anti-aircraft gun.