|Name||Russian Man "Control"|
|Voice||Male, automated (the same as S06)|
|Emission mode||USB + carrier|
|Known counterpart stations|
S25 is run by Russian Main Intelligence Directorate (GRU).
The standard a format is given below. The outro is sometimes preceded by a quintuple group repeated for several minutes.
|Section #1||Section #2||Outro|
|3-figure ID||5-figure group, purpose unknown||3-figure ID||5-figure group, purpose unknown|
|Repeated for 4 minutes||Repeated for 4 minutes|
In the 1990s S25 had a daily schedule at 08:00 UTC, for the first 20 minutes on 14890kHz, then for the remaining 20 minutes on 11270kHz. Each transmission had four sections, repeated for 10 minutes each. The ID was always 615. The ending was "615 615 615 000". In 1998, its operation was changed to weekly on Monday only, then disappeared completely in 1999.
In September 2004, the current format was introduced. S25 can have years long breaks in operation - it was unheard in 2004-2007, 2007-2012, 2012-2014.