Short Weather Cipher

The Short Weather Cipher, was a cipher used by the radio men aboard U-boats of the German Navy (Kreigsmarine) during World War II. It was used to condense weather reports into a short 7 letter message, which was enciphered by using the naval Enigma and transmitted by radio men to intercept stations on shore, where it was de-enciphered by Enigma and the 7 letter weather report was reconstructed. ^[1][2]

References

1. T. W. Körner (5 December 1996). Trinity Hall, ed. The Pleasures of Counting. Cambridge University Press. pp. 399–. ISBN 978-0-521-56823-4.
2. "Codebreaking and the Battle of the Atlantic David Kahn" (PDF). USAFA Harmon Memorial Lecture #36. p. 8. Retrieved 27 April 2016.