The 2nd U-boat Flotilla (German 2. Unterseebootsflottille), also known as the Saltzwedel Flotilla, was the second operational U-boat unit in the German Kriegsmarine. Founded on 1 September 1936 under the command of Fregattenkapitän Werner Scheer, it was named in honour of Oberleutnant zur See Reinhold Saltzwedel. Saltzwedel, a U-boat commander during World War I, died on 2 December 1917, when his submarine UB-81 was sunk by a mine in the English Channel.