The Dowding System organization

 
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Radio Direction Finding (RDF)

The secret weapon that gave Britain eyes beyond its coasts.

 
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The Filter Room

The heart of the Dowding System, where information from the RDF stations was processed, errors corrected, and critical decisions were made.

 
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Fighter COMMAND hq

Where Air Chief Marshall Hugh Dowding and staff oversaw and coordinated the defense of Great Britain.

 
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Group Operations

Here resources are monitored, raids are tracked, and defending squadrons are detailed to intercept German planes.

 
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Sector Operations

The tip of the spear. From here pilots were scrambled, tracked, and guided to the incoming raiders.