priyom.org

M03c

Enigma ID M03c

Name
Frequencies
Status Inactive
Voice N/A
Emission mode ICW
Location Poland
Activity pages

Known counterpart stations E11b, S11b

M03c refers to M03 messages that began and ended with the groups "77777 77777", which were included in the amount of groups given in the preamble. First heard in August 2000[1], last heard on 4 December 2008[2].

Format is given below. The speed was always 15 words per minute.

Preamble Message Repeat Outro
233 / 36 BT BT 77777 77777 77777 77777 90432 90432 ... 15369 15369 77777 77777 77777 77777 BT BT 233 / 36 BT BT 77777 77777 90432 ... 15369 77777 77777 BT BT 0 0 0
3-figure ID   Amount of 5-figure groups in the message, including 77777's   5-figure paired groups   3-figure ID   Amount of 5-figure groups in the message, including 77777's   5-figure single groups  
Repeated for 3 minutes and 20 seconds

On each schedule, an M03c message would have been sent on one random week of each month. The messages were never shorter than 30 groups, and never longer than 39. M03 messages sent from mid-2008 onwards also have the same group count constraint, but no longer contain "77777" groups - however similar groups are still present in its digital counterpart, POL FSK.

Voice equivalents, E11b and S11b, appeared in August 2003 and March 2006, respectively.

References

  1. ENIGMA 2000 Newsletter #19 (accessed August 28th, 2014)
  2. Enigma 2000 Newsletter #50 (accessed August 28th, 2014)
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