Electronic Airborne Goldfish

.In January 1940 the author was attached for on-the-job training in ground and flight testing of production equipment,to the small group of scientists and technicians at RAF St. Athan who were just completing the development of the first operational airborne radar equipments.In the summer of 1940 he flew on convoy patrols in a Sunderland flying boat as the radar operator,by 1945 he had carried out somee 200 flight tests.