TributeLegacy
Create a tribute page
Back to map All in England

blue plaque · England

convex dish

Photograph at the convex dish blue plaque

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

Inscription drawn from imported open data, awaiting original TributeLegacy editorial.

Source: Open Plaques. Geographic data via OpenStreetMap.

Nearby locations in England

Browse all memorials in England

Data sources

Location records are drawn from open, licence-clean datasets, kept here with attribution and gratitude to the people who maintain them.

  • Open Plaques, dedicated to the public domain (CC0). See openplaques.org.
  • Wikidata, available under the CC0 1.0 Universal dedication.
  • © OpenStreetMap contributors, available under the Open Database Licence.
  • Historic England, National Heritage List for England, used under the Open Government Licence v3.0. War memorial records are drawn from open community datasets (OpenStreetMap, Wikidata, NHLE) — never from the Commonwealth War Graves Commission, which is excluded.

Editorial descriptions, photography and tribute links are original TributeLegacy work, layered on top of the open data.

Directions to here