 On 21 April , the Grand Fleet conducted a demonstration off Horns Reef to distract the Germans , while the Russian Navy <unk> its defensive minefields in the Baltic Sea . The fleet returned to Scapa Flow on 24 April and <unk> , before proceeding south in response to intelligence reports that the Germans were about to launch a raid on <unk> . The Grand Fleet did not arrive in the area until after the Germans had withdrawn . During 2 – 4 May , the fleet conducted another demonstration off Horns Reef to keep German attention focused on the North Sea . 
