From 1915 to 1952 Sir Robert watson-Watt did research for the British government in electromagnetic radiations, meteorology, and radio, and he investigated their application to aviation. In 1935, 16 years after obtaining the first patent for a radar instrument, Watson-Watt successfully demonstrated a new type of radio-locating device that could spot and count aircraft, by night and by day, at distances exceeding 161 km (100 mi). This led to the development at a critical time of the first practical system of radar that was used effectively against German aircraft in World War II. We have obtained a copy of the original Patent courtesy of the European Patents Office Online  The Original Patent Our Gallery of pictures is slowly expanding as we receive more photos from website visitors, sponsors and within the worldwide community who share our fascination and interest in the history of Sir Robert Watson-Watts development of Radar We would appreciate your feedback on the following pictures and your contributions are always appreciated The Gallery Sir Robert Watson-Watt  : An Historic Gallery dedicated to a GREAT Scot Designed and Managed by : Mearnswood Media Limited Your donation will make a difference :: When considering how to support your community please remember the Watson-Watt Society. Visit our latest Memorial Project and to see how you can help us achieve worldwide recognition for another Great Scot.  Sir Robert Watson-Watt Society of Brechin OUR APPEAL TO SUPPORTERS, SPONSORS & OUR COMMUNITY ~ © 2009 Watson-Watt Society of Brechin. Registered Charity No. SC037545 Watson-Watts equipment Watson-Watt Watson-Watt and ?? Watson-Watt at work Watson-Watts equipment Watson-Watt Click thumbnail to enlarge Sir Robert Watson-Watt Watson-Watts at work Watson-Watt Operations room Watson-Watts Bawdsey Chain home Radar Station Watson-Watt Chain home radar towers Watson-Watts Experimental Hut Watson-Watt in the Hut Flat nose Morris Van - RDF station Transmitter towers This stamp is from the set issued in March 1991 celebrating Scientific Achievements. The 31p stamp shows a radar sweep across East Anglia, marking the importance of Sir Robert Watson-Watt’s invention to the airbases of eastern England during World War 2. Robert Watson-Watt was a descendent of James Watt, inventor of the practical steam engine. Robert’s skills in the field of ‘wireless telegraphy’ or radio, saw him progress from the University of Dundee to heading the Radio Department of the National Physical Laboratory. In 1934 he was approached by the Air Ministry to produce a counter to the Nazis’ rumoured ‘death ray’. Watson-Watt demonstrated that such a device was impossible to construct, but at the same time provoked ministry interest in the possibility of long-range radio detection of aircraft. From outlining the concept in a memo of February 1935, via practical testing at Orfordness in Suffolk, the operational range of the system was 100 kilometres by the end of 1935. By the end of the war over 50 radar stations had been built, and Watson-Watt had been knighted for his work. The stamp was designed by J Harwood. (courtesy of the British Postal Museum) A STAMP of recognition You can also see pictures of Brechin, his City of Birth at the Brechin Civic Trust Website Watson-Watts equipment bench Watson-Watts Equipment Original receiving station (Van) Caption text Original Patent The original concept Memorial South of Weedon Principles of the RDF system Caption text