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The Wireless-Set-No19 Group
Royal Signals

1793 Air Publication AP1234E - Radio Navigation Aids
This large document (376 pages) covers Radio and Radar theory, plus many of the systems used in World War 2:

  • D/F Systems
  • Radio Compasses
  • Standard Beam Approach
  • Radio Altimeters
  • Ground Controlled Approach
  • GEE
  • H2S and ASV
  • Rebecca and Eureka
  • BABS

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