Short Weather Cypher Decrypting Procedure

 

Kriegsmarine

 

M3-UKW = B

 

M3-UKW = C

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SHORT WEATHER CYPHER DECRYPTING PROCEDURE 

 

Decrypting a Kriegsmarine 3-rotor Short Weather Cypher Message

 

Note:  The Kriegsmarine 3-rotor and temporarily modified 4-rotor Enigma machines were used by U-boats and converted fishing trawlers to relay

weather information from the north and west, the directions from which Germany's weather came, to B.d.U. (U-boat Headquarters). These "floating weather observers" were critical to both German strategic (long-range) and tactical (short-range) battle planning.

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To view this entire procedure, please click on "The Short Weather Cypher Decrypting Procedure" bullet below.

 

1.  Print-out a paper copy of all of these documents by clicking on the links:

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• The Short Weather Cypher Decrypting Procedure

• Kriegsmarine M3-UKW = B and C Inner Settings

• Kriegsmarine M3-UKW = B and C Outer Settings

• Short Weather Cypher Tables (A, C, DDD, E, G, K, L, M, PPP, R, T, V, W, and Z)

• Table BB - Sea Area Grid Map  (This is a large file. It will take a minute to load.)

• Message Decryption Sheet - (Example)

• Message Decryption Sheet - (Blank)

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Note: We will select sample values from the tables to use for our example U-boat in this procedure.  To send your own Enigma-encrypted

Short Weather Cypher message to a friend, you may, of course, choose any table settings or values you wish.

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