sentences:  As the French bases fell to the advancing Allies, "U-309" was transferred again, this time to the "33rd U-boat Flotilla" based at Flensburg.Under her new commander "Oberleutnant zur See" Herbert Loeder she left La Pallice on 29 August 1944, and sailed around the British Isles to Stavanger, Norway, arriving on 13 October.The U-boat left there after only two days, sailing to Flensburg by the 21st.