sentences:  "U-309" 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 two twin C/30 anti-aircraft guns.The boat had a complement of between forty-four and sixty.After training with the "8th U-boat Flotilla" at Königsberg, "U-309" was transferred to the "11th U-boat Flotilla" based in Bergen on 1 August 1943, Norway, for front-line service.