S04
| Enigma ID | S04 |
| Name | Edna Sednitzer |
| Frequencies | |
| Status | Inactive |
| Voice | Female, automated |
| Emission mode | LSB |
| Location |
Bulgaria
|
| Activity pages |
S04 belonged to one of Bulgarian intelligence agencies. The language was Bulgarian. Last heard in 2006.[1]
Format:
| Preamble | Message | Repeat | Outro | |||||
|---|---|---|---|---|---|---|---|---|
| 342 | Nomer 222 | Grupi 238 | 47175 18030 20166 ... | 342 | Nomer 222 | Grupi 238 | 47175 18030 20166 ... | 0 0 0 |
| 3-figure ID | Serial number | Amount of 5-figure groups in the message | 5-figure single groups | 3-figure ID | Serial number | Amount of 5-figure groups in the message | 5-figure single groups | |
| Repeated for 5 minutes | Repeated for 1 minute | |||||||
The serial number was increased each time a new message was sent on a given schedule.
The following pronunciation was used:
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Nùla | Ednà | Dvoika | Tri | Chètiri | Petorka | Shest | Sèdnitsa | Òsem | Dèvet |
History
Little is known about S04. It was active in the 1980s, but has later fallen into disuse in favor of its Morse code counterpart, M13.
It was re-activated in November 1999[2], with one schedule - second Monday and Tuesday of each month at 21:45 UTC (winter 22:45), with ID 537 for messages 23 groups or shorter, or 342 otherwise. That was the only schedule of re-activated S04, that remained active until its demise in early 2006.
References
- ENIGMA Control List, Revision #25 [accessed September 18th, 2014]
- ENIGMA Newsletter #18 (January 2000), p. 11 - read a scanned version here
