Germany's submarine offensive was suspended on 18 September by the chief of the "Admiralstab", Admiral Henning von Holtzendorff, In response to American demands after the sinking of the Cunard Line steamer in May 1915 and other high-profile sinkings in August and September. Holtzendorff's directive from ordered all U-boats out of the English Channel and the South-Western Approaches and required that all submarine activity in the North Sea be conducted strictly along prize regulations. Shortly after this cessation, "UB-5" was transferred to the Baltic Flotilla () on 9 October.