II./KG 55 used "Knickebein" and Direction finding methods when British countermeasures from No. 80 Wing RAF did not impede them. They also learned to navigate by using searchlights and shell bursts from anti-aircraft artillery as a reference point because they denoted the close proximity of cities, coastlines and lights were often connected to railways. Good use was also made of British dummy airfields intended to lead German crews astray—they were carefully plotted and recorded. II./KG 55 used LC 50 parachute flares—an operation often attributed to "KGr" 100—then proceeded to bomb visually using "Lotfernrohr" 7 bomb sights. The "Gruppe" was predominantly equipped with He 111P-4s; the other units were equipped with more powerful He 111H-5s. The resulting Battle of the Beams lasted until the end of the Blitz. In one incident the British jamming succeeded in confusing the KG 55 He 111 piloted by "Leutnant" Hans Thurner, who landed on three occasions on RAF airfields in rapid succession before realising his error and escaping across the Channel.