During the 1930s the popular press were carrying stories of a death ray that could disable aircraft, and it became such a popular notion that an investigation was carried out by a government scientist, Robert Watson-Watt. His discovery was that it was not that electro-magnetic waves could interfere with aircraft, but that aircraft could interfere with radio transmissions. The strategic importance of this was appreciated and a secret establishment was set up to develop a means of using radio transmissions to detect the approach of enemy aircraft - the birth of radar. As World War II broke out Ian Goult joined this elite group of scientists - aged only sixteen - as a lab assistant, working on GEE, a navigational aid allowing accurate location of targets. Its success allowed Bomber command to effectively navigate as far as the Ruhr. In Secret Location, Goult describes taking part in work on radar and microwave techniques that gave Britain supremacy in the air, and greatly improved submarine detection during the Battle of the Atlantic, saving thousands of tons of materiel and many lives. Told in an engaging style, this book offers a unique insight in those men whose achievements during the war have been underappreciated, but whose efforts were a key factor in the Allied victory. Postwar, Ian Goult was closely involved in the development of ground proximity warning systems and and the very first ATOL.