Heads up everybody. The Association of Royal Air Force Fighter Control Officers is looking to get in touch with all operators, male or female, of the Royal Air Force's World War II era (1939-1945) warning system known as the "Dowding System" as follows:

“Working under the closest secrecy since 1939, over 4,000 Women’s Auxiliary Air Force (WAAF) personnel have played an important part in the air victories achieved by radiolocation (Radar). They tracked hostile and friendly aircraft, flying bombs and rockets, German E Boats and Allied Merchant vessels, and have guided British and Allied

During World War II Nazi Germany primarily encoded its messages through the use of what was known as the "Enigma" machine. Enigma’s use by the Wehrmacht stretched back to the early 1930s and originated from a design created by Hugo Alexander Koch in the Netherlands.

Although heavily modified prior to the Second World War’s onset, the Enigma machines used in 1939-1945 remained similar to Koch’s prototypes from two decades prior. For a variety of reasons the Enigma machine was extraordinarily difficult to crack.