The last piece of armament that the Type IXB submarines were equipped with were the standard 2 cm (0.79 in) anti-aircraft guns. All Type IXB submarines could hold up to 56 crew members at any given time though that number was usually around 45–48 crew members. After being commissioned and deployed, all of the Type IXB submarines built prior to the fall of France were stationed in the German port city of Wilhelmshaven while those who were commissioned following the capture of numerous French ports during the Battle of France were stationed in Lorient.[2]