GEMA was one company that pioneered this technology, while Klein Heidelberg parasitized off of another instance of this technology. A center for this technology was the target of Operation Biting, which Josef Kammhuber names an instance of. Henry Tizard led a committee that investigated the deployment of this technology, which was countered by “window.” IFF using this technology was one proposed feature of (*) Chain Home, the centerpiece of the Dowding System. A myth about carrots (-5[1])improving vision (10[1])may have been a cover (10[5])for this technology, (10[1])which was eventually used to detect V-2s. Ground stations managed to detect many German fighters during the Battle of Britain with, for 10 points, what technology that uses radio waves to search for targets? ■END■ (10[1])