Chain Home, or CH for short, was the codename for the ring of coastal early warning radar stations built by the Royal Air Force before and during the Second World War to detect and track aircraft. Ini
Chain Home at RAF Poling, West Sussex
Robert Watson-Watt's position with the National Physical Laboratory placed him at the centre of a network of researchers whose knowledge of radio physics was instrumental to the rapid development of radar.
Stanley Baldwin's 1932 comments on future aerial warfare led to a "feeling of defencelessness and dismay." It was the UK's concern about this issue that led to so much support being given to radar development while other countries had a much more lackadaisical approach until the war started.
A 1925 radio magazine photograph of Grindell-Matthews' death ray
Radar, Gun Laying, Mark I, or GL Mk. I for short, was a pre-World War II radar system developed by the British Army to provide range information to associated anti-aircraft artillery. There were two u
GL Mk. II transmitter van
Aerial photo of a gun laying mat installed on the east coast, north of Sunderland. The ramp and platform at the centre are prominent.
The GL Mk. III B was much smaller and far more mobile than the Mk. II it replaced.
This image from an AI Mk. IV radar is similar in concept to the GL Mk. II, although it displays blips on either side of a centreline rather than as two peaks on one side. The blips are just visible about half-way along the baseline. The large triangles at the top and right are caused by ground reflections, and are not present in GL systems.