 Admiral Scheer's fleet, composed of 16 dreadnoughts, six pre-dreadnoughts, six light cruisers, and 31 torpedo boats departed the Jade early on the morning of 31 May. The fleet sailed in concert with Hipper's five battlecruisers and supporting cruisers and torpedo boats. The British navy's Room 40 had intercepted and decrypted German radio traffic containing plans of the operation, and so sortied the Grand Fleet, totaling some 28 dreadnoughts and 9 battlecruisers, the night before in order to cut off and destroy the High Seas Fleet.
