Abstract :
The use of radar in World War II to track incoming enemy bombers was a vital factor in the successful defence of Great Britain against air attack both by day and by night. It also made a valuable contribution to our conduct of the war at sea and to our bomber offensive. We owe the fact that both ground and airborne radar were developed in an operationally effective form in time for use in World War II largely to Sir Robert Watson-Watt. He proposed and demonstrated ground radar in 1935 and then initiated the development of both ground and airborne radar into an effective military system, firstly at Orfordness and later at Bawdsey Research Station.
