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Funkverkehrsheft
Funkverkehrsheft für die Küstenverteidigung · 1943 - wanted item

During World War II (WWII), the German Kriegsmarine (Navy) used this codebook in addition to other cipher methods. It was used to make messages related to coastal defense shorter and more efficient when encrypting and sending them via the short-wave radio bands by means of morse code. When using encryption, the codebook added an extra layer of obscurity to the cipher.

The full title of the book is Funkverkehrsheft für die Küstenverteidigung (Radio Traffic Book for Coastal Defence). It contains a number of entries that can be altered manually, as shown here.

In this case, the book was used by the German Navy during WWII for messages related to the defense of the Dutch coast. The names of certain Dutch towns and cities have been pencil-written into the book. They are translated into 3-letter codes in order to shorten the message. This requires the recipient to have an identical code­book with the same pencil-written additions.
  

The codebook shown here is from the collection of Arthur Bauer in The Netherlands [1]. Many thanks for allowing us to take some photographs of it.

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References
  1. Arthur Bauer, Foundation for German communication and related technologies
    Museum for historical German technology (mainly used before and during WWII).
    Retrieved September 2008.
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Crypto Museum. Created: Friday 19 September 2008. Last changed: Friday, 23 February 2018 - 22:01 CET.
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