After the Battle of Jutland, Admiral Scheer argued that the fleet could not break the British naval blockade, that only the resumption of unrestricted U-boat warfare would be successful. As a result, the High Seas Fleet largely remained in port, with the exception of two abortive sorties in August and October 1916. In April 1917, "Helgoland" accidentally rammed the new battlecruiser , which was in the process of fitting-out, as she left her berth. In October 1917 "Helgoland", in company with "Oldenburg", went to Amrum to receive the light cruisers and , which were returning from a raid on a British convoy to Norway. On 27 November the ship traversed the Kaiser Wilhelm Canal into the Baltic, but did not participate in the occupation of the islands in the Gulf of Riga. A third and final fleet advance took place in April 1918, but was cut short when the battlecruiser "Moltke" developed engine problems and had to be towed back to port.