Date of Birth: 
About Leonard George Chapman
- Squadron Leader Leonard George Chapman (28 March 1910 – 25 July 1975) was an inventor, radio engineer and Royal Air Force officer. While serving in the Royal Air Force he invented the 'Chapman Method' in 1937–1938.
- This method accurately determines the location of an object from the time difference of arrival of a signal (possibly radio echo) emitted from that object to three or more receivers.
- A method commonly used in civil and military surveillance applications, and also known as Multilateration.
- Thus it has been suggested that Chapman be nominated as the father of Multilateration.Chapman was in charge of installing 5 radar stations as part of the Chain Home system.
- Including the Netherbutton station in the parish of Holm, Orkney Islands, the installation of which Chapman performed while only holding the rank of Corporal.He had a long and distinguished career holding a variety of commands, rising to the rank of Squadron Leader and receiving a permanent commission.
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