At the outbreak of war in September 1939, both the United Kingdom and Germany had functioning radar systems. In the UK, it was called RDF, Range and Direction Finding, while in Germany the name Funkmeß (radio-measuring) was used, with apparatuses called Funkmessgerät (radio measuring device).

High-frequency direction finding, usually known by its abbreviation HF/DF or nickname huff-duff, is a type of radio direction finder (RDF) introduced in World War II. High frequency (HF) refers to a radio band that can effectively communicate over long distances; for example, between U-boats and their land-based headquarters.

Initially known as RDF, and given the official name Air Ministry Experimental Station Type 1 (AMES Type 1) in 1940, the radar units were also known as Chain Home for most of their life. Chain Home was the first early warning radar network in the world and the first military radar system to reach operational status. [ 2 ]

Dramatic headlines from newspapers and animated maps showing the creation of a network of CH stations and three mobile RDF installations covering the Thames, Forth, Humber and Wash estuaries in time for the September 1938 Munich Crisis and …

By the outbreak of the Second World War in 1939, a chain of early warning radar stations, called Chain Home (CH) stations, had already been built along the south and east coasts of Britain.

Mar 9, 2024 · Two of those boundary-breaking technologies were wireless telegraphy and aviation. The story of Radio Direction Finding, or RDF, joins these two in pioneering a technology that would help to win the Battle of Britain.

The British called their secret radio location sets RDF meaning “radio direction finding,” which was an unclassified term because virtually all nations used radio direction finding equipment. To U.K. radio location insiders, RDF really meant “range and direction finding.”

Land and shipboard high-frequency radio direction finding (HF D/F or Huff Duff), is now generally recognised as being with radar and code-breaking, a primary factor in the allied victory in the Battle of the Atlantic against the German and Italian submarine onslaught against shipping. Perhaps this is evenly balanced?

From 1942 the Department of Munitions assumed responsibility for the production of radar equipment in Australia. It was also responsible for the supervision of private contractors who made radar equipment and arranged for the import and export of …

Direction finding (DF), or radio direction finding (RDF), is the use of radio waves to determine the direction to a radio source. The source may be a cooperating radio transmitter or may be an inadvertant source, a naturally-occurring radio source, or an illicit or enemy system.