sorties sent out would return without having encountered the enemy. During the Battle, average rates were around 90%, and several raids were met with 100% success rates. Lacking their own direction system, Luftwaffe fighters had little information on the location of their RAF counterparts, and often returned to base having never seen them. When they did, the RAF fighters were almost always in an advantageous position.

Although many histories of the Battle of Britain comment on the role of radar, it was