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Convex dish blue plaque

Blue plaque

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What is recorded here

This blue commemorative plaque records: City of Sunderland Coastal Watch Mirror This convex dish detected German Zeppelins sent to bomb north-east ports. Their course could be judged from engine sounds focussed onto a receiver, giving 15 minutes warning for anti-aircraft defences to be directed onto them. World War I Defences Recorded plaque organisation: City of Sunderland.

From the Open Plaques record 50433

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Photo credits
  • John M, Wikimedia Commons · CC BY-SA 2.0
  • rob bishop, Wikimedia Commons · CC BY-SA 2.0
  • Chris Allen, Wikimedia Commons · CC BY-SA 2.0
  • JThomas, Wikimedia Commons · CC BY-SA 2.0
  • Mike Quinn, Wikimedia Commons · CC BY-SA 2.0
  • Weston Beggard, Wikimedia Commons · CC BY-SA 2.0
  • Rossographer, Wikimedia Commons · CC BY-SA 2.0
  • trevor willis, Wikimedia Commons · CC BY-SA 2.0
  • Tim Heaton, Wikimedia Commons · CC BY-SA 2.0

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