 Complete the following phrase:  On 19 March 1916 the ship completed repairs to her turbines, which had kept her at Scapa for nearly six weeks. On the night of 25 March, Hercules and the rest of the fleet sailed from Scapa Flow to support Beattys battlecruisers and other light forces raiding the German Zeppelin base at Tondern. By the time the Grand Fleet approached the area on 26 March, the British and German forces had already disengaged and a strong gale threatened the light craft, so the fleet was ordered to return to base. On 21 April, the Grand Fleet conducted a demonstration off Horns Reef to distract the Germans while the Imperial Russian Navy relaid its defensive minefields in the Baltic Sea. The fleet returned to Scapa Flow on 24 April and refuelled before proceeding south in response to intelligence reports that the Germans were about to launch a 