The German ships, four light cruisers of II Scouting Force, eight destroyers, three divisions of minesweepers, eight Sperrbrechers (cork-filled trawlers, used to detonate mines without sinking) and two trawlers to mark the swept route, were spotted at 7:30 a.m., silhouetted by the rising sun. The light battlecruiser and the light cruiser opened fire with their forward guns seven minutes later. The Germans responded by laying an effective smoke screen. The British continued in pursuit, but lost track of most of the smaller ships in the smoke and concentrated fire on the light cruisers as opportunity permitted. "Repulse" was detached not long after and raced forward at full speed to engage the enemy ships. She opened fire at about 9:00, scoring a single hit on the light cruiser during the battle. When the German battleships and were spotted about 9:50 the British broke off their pursuit and "Repulse" covered their retreat, aided by a heavy fog that came down around 10:40. The ship fired a total of 54 15-inch shells during the battle and scored one hit on the light cruiser "Königsberg" that temporarily reduced her speed.