|Voice||Female, automated, severely distorted|
|Known counterpart stations||E18, S04, M13|
G22 belonged to one of Bulgarian intelligence agencies. Last heard in early 2006.
|186||Nummer 246||Gruppen 21||47018 02174 15554 ...||186||Nummer 246||Gruppen 21||47018 02174 15554 ...||0 0 0|
|3-digit ID||Serial number||Group count||5-digit single groups||3-digit ID||Serial number||Group count||5-digit 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 voice samples were severely distorted, resulting in difficulty in comprehending the numbers. In addition to that, the following pronunciation was used:
Little is known about G22. 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 September 1997, with one schedule - third Thursday of each month at 22:00 UTC (November - March: 23:00), within 4-6 MHz range, with ID 186. That was the only schedule of re-activated G22, that remained active until its demise in early 2006.
- ENIGMA Control List, Revision #25
- ENIGMA Newsletter #14 (January 1998), p. 9 - read a scanned version here