On 23 October seven U-boats at large in the North Sea (U-108, UB-86, UB-121, UB-125, UB-96, UC-58 and U-60) were diverted by wireless signals to take up positions off Rosyth, in order to give the alarm when the British Fleet sailed, and hopefully launch attacks.[15][lower-alpha 8] In addition, U-43, also at sea, was directed to take up a watching position near the Tyne.