|Frequencies||2707, 5015, 7404, 11108|
|Voice||Female, automated, the last digit in the groups was inflected (the same as G14 and G16)|
|Emission mode||AM, USB|
|Known counterpart stations|
G15 was a part of BND's extensive number station network. This one always transmitted on four frequencies simultaneously - 2707, 5015, 7404, 11108 kHz - eight times a day, every single day of the year, at 00:00, 00:30, 06:00, 06:30, 12:00, 12:30, 18:00 and 18:30 UTC. The :00 transmissions were the primary sendings done in AM mode, and the :30's - repeats done in USB mode.
|Papa November||Random electronic melody||Es folgen Mitteilungen für||824||824||4 gruppen||Achtung||824||824||4 gruppen||123-34 123-34 898-56 898-56 299-64 299-64 132-77 132-77||Ende|
|Repeated 4 times||"Messages are following for"||3-figure recipient ID||Amount of 5-figure groups in the message||3-figure recipient ID||Amount of 5-figure groups in the message||5-figure paired groups, with a break after the third digit.|
|Repeated for 5 minutes||Repeated as necessary with different data for multiple messages||For each message|
Unlike all the other G16 stations, G15 had a very large number of recipients, but all received very short messages. The messages sent were rotating throughout the week, as presented below: (the 3 digits are the ID, the one or two digits afterwards - the amount of groups)
G15 was generally very stable in operation, with transmissions always starting right on time with very few mistakes made during them. On one occasion, the sister station G14 was noted being sent on the four frequencies of G15, rather than on its own, instead of G15.
Details on encryption and decryption of G15 messages can be found in this declassified Polish counter-intelligence document.
List of ID's used by G15:
[Based on Simon Mason's 1991 book Secret Signals]
[ID's from Numbers & Oddities #58]