G18
| Enigma ID | G18 |
| Name | Eight Note Rising Scale |
| Frequencies | |
| Status | Inactive |
| Voice | Female |
| Emission mode | AM |
| Location |
Czechoslovakia
|
| Activity pages |
G18 was presumably operated by Czechoslovak intelligence, guessing by similarities of the format with S10. Ceased around 1973. Only one recording is known to exist, made by Simon Mason, which is included on The Conet Project.
Transmission format:
| Preamble | Message | Outro | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Eight note rising and falling scale | 67882 | 91 | 24 | Achtung, Achtung, Achtung | 78327 78327 49858 49858 12083 12083 ... | 67882 | 91 | 24 | Ende |
| Presumably 5-figure recipient ID | Presumably 2-figure one-time pad number | Amount of 5-figure groups in the message | 5-figure paired groups | Presumably 5-figure recipient ID | Presumably 2-figure one-time pad number | Amount of 5-figure groups in the message | |||
| Repeated for 5 minutes | |||||||||
The voice used standard German military pronuncation of "2" and "9", being rendered as "zwo" and "neuen", respectively.
[Based on a letter on Simon Mason's website]