W.A.A.F. Radar Workers -- An airwoman plotting aircraft on the Cathode-Ray tube. Working under the closet secrecy since 1939, over 4,000 W.A.A.F. personnel have played an important part in the air victories achieved by radiolocation. They have tracked hostile and friendly aircraft, flying bombs and rockets, German E-boats and Allied Merchant vessels and have guided British and Allied fighter pilots on to enemy aircraft. Trained to use and service some of the most delicate and complicated instruments ever invented, they have carried out their duties with enthusiasm, often under uncomfortable conditions and sometimes under enemy fire. October 15, 1945. (Photo by British Official Photograph).