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 (-5[1])of this technology, which was countered by “window.” IFF (15[1])using this technology was one proposed feature of (*) Chain Home, the centerpiece of the Dowding System. A myth about carrots improving vision may have been (10[1])a cover for this technology, 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[2])