S11 was a numbers station operated by Polish intelligence. It was replaced by S11a in early 1994, but was heard again for a short time in August-September of 2002 with training messages.
When S11 was first observed, it strangely never sent any messages. It raises the question why they would transmit an agent ID for over 2 years (and maybe much longer) and never send an actual message. Perhaps it was a numbers station intended for a deep cover agent, or special operation.
Message Recording
Message Format
| Preamble | Message | Repeat | Outro | ||||
| 518 | “Kreska” | 28 | “Uwaga” | 55083 55083 84057 84057 … | “Uwaga” | 55083 84057… | “Koniec” |
| 3-digit ID | “/” | Group count | 5-digit paired groups, pauses every 10 pairs |
5-digit single groups, pauses every 10 groups |
|||
| Repeated for 5 minutes | |||||||
Null Format
| 237 | “Kreska” | 00 | “Koniec” |
| 3-digit ID | “/” | ||
| Repeats for 5 minutes | |||
Used a variant form of Polish numbers
| 0 = Zero | 1 = Jedynka | 2 = Dwójka |
| 3 = Trójka | 4 = Cztery | 5 = Piątka |
| 6 = Sześć | 7 = Siedem | 8 = Osiem |
| 9 = Dziewiątka |
Numbers Station Summary
Nickname: Kreska (Presta/Preska, see format for notes)
Activity: Inactive
Emission mode: USB
Voice Summary: Automated woman’s voice. Similar to E11 but in Russian.
Location: Poland (52°8’37″N 20°53’60″E)
Counterpart Stations: E11, G11, S11a (ex-S12), M03, G10, S26, M20
Station Family: Family 3 “Strich”
Source
Simon Mason’s website recording & historical info
ENIGMA Newsletter Issue #4 (January 1994), Page 9
ENIGMA 2000 Newsletter Issue #12 (September 2002), Pages 9, 20-21
ENIGMA 2000 Newsletter Issue #13 (November 2002), Page 24
