"Königsberg" then retreated into the Rufiji River to repair her engines. Before the repairs could be completed, British cruisers located "Königsberg"; the Navy List for April 1915 lists on the East Coast of Africa under Part XI, Other Foreign Stations, page 22 (1363), the light cruisers Hyacinth, , and . Unable to steam into the river to destroy "Konigsberg", the Royal Navy ships set up a blockade. Aircraft were sent to join the effort and Squadron Commander Robert Gordon was appointed in January 1915 as commander of the Royal Naval Air Service in East Africa. After several attempts to sink the ship during the Battle of Rufiji Delta, the British sent two monitors, and , to destroy the German cruiser. On 11 July 1915, the two monitors got close enough to severely damage "Königsberg", forcing her crew to scuttle the ship.