RSDN-20 (Alpha)
Intelligence briefRF forces
Long range radio navigation system
Unit intelligence profile
Radio/Communications Centers, Posts, Sites etc.
- Subordinates
- 3
- Locations
- 32
Profile summary
Assessment
Identity
This record is best identified as a dispersed set of Russian military communications facilities rather than a single site. Open sources directly corroborate multiple named anchors inside the placemark set: the UVB-76/"Buzzer" network around Saint Petersburg and Naro-Fominsk, the Rostov-on-Don "Pip" network, unit 48905 in the Yegoryevsk district, unit 52917 at Agalatovo, and an RSDN-10 long-range navigation station type used by the Ministry of Defence. The hierarchy label does not map cleanly to one publicly confirmed Security Council-owned installation. ([priyom.org](https://priyom.org/military-stations/russia/the-buzzer))
UVB-76 anchors
Placemark 1 and 2 strongly match Priyom's published transmitter coordinates for the Russian military HF channel-marker network known as "The Buzzer": 60°18'40.1"N 30°16'40.5"E near Saint Petersburg and 55°25'35"N 36°42'33"E near Naro-Fominsk. Priyom assesses the network as serving the Western Military District on 4625 kHz, with control attributed to the Sudak/Agalatovo communications hub and identified transmitters at the 60th and 69th communications hubs. That site-to-network attribution is OSINT-based rather than an official Russian disclosure. ([priyom.org](https://priyom.org/blog/real-buzzer-site-found%21.aspx))
Rostov network
Placemark 4 and 5 also align closely with Priyom's documented "Pip" sites near Rostov-on-Don: a transmitter at 47°17'58"N 39°40'26"E and a separate receiver at 47°19'37"N 39°45'12"E. Current open-source monitoring describes "The Pip" as an active Russian military command network associated with the Southern Military District, using 5448 kHz by day and 3756 kHz by night, with additional linked frequencies for relays and reply traffic. ([priyom.org](https://priyom.org/military-stations/russia/the-pip))
Other verified nodes
The Yegoryevsk-area transmitting-center placemarks are partly corroborated by public registry and labor-safety records for Federal Treasury Institution/Unit 48905 in Yegoryevsk district, including the Timshino/Vesenniy area. Those records list the unit as active and show multiple engineering, electronics, software, and telecommunications-related positions, which supports identification as a substantial technical communications site; the reviewed open sources do not publicly confirm its precise radio mission. A separate Defence Ministry order also places unit 52917 in the Agalatovo/Vartemyagi area, supporting the existence of a military communications installation there. ([companies.rbc.ru](https://companies.rbc.ru/id/1035002356938-federalnoe-gosudarstvennoe-kazennoe-uchrezhdenie-federalnoe-kazennoe-uchrezhdenie-vojskovaya-chast-48905/?utm_source=openai))
Architecture
The verified subset shows a mixed architecture: district-level HF command networks, fixed transmitting and receiving sites, and separate technical garrisons with engineering staff. The placemark list also includes an RSDN-10 "Tropik" long-range navigation station type; institutional sources say the Ministry of Defence has operated RSDN-10 as a ground-based long-range navigation system and has been replacing it with newer systems, while a 2023 navigation conference paper lists military aviation, naval vessels, and submarines among RSDN users. Taken together, this record appears to describe a redundancy-oriented military communications and navigation network rather than one command post. That final characterization is an analytic inference from the verified mix of sites. ([hiik.ru](https://hiik.ru/upload/iblock/a5d/4udomfud5ejvbefxz4288faogrfvycuo.pdf?utm_source=openai))
Confidence limits
Many remaining placemarks are labeled only as "communications site," "radio center," "antenna field," or "communications node." I did not find sufficiently authoritative open sources to confirm exact unit, mission, or current status for all 32 sites from the supplied names and coordinates alone. Those entries should therefore be treated as plausible communications-related locations, not fully verified site identifications.
Command structure
Subordinate formations
CHAYKA Radio Navigation System
BETA VLF Accurate Time Service Network
RAB99 "Titan"
Intelligence briefRF forces
Provides radio communication with submarines
Geospatial index
Known places
60th Communications Hub
Intelligence briefRF forces
The Buzzer (UVB-76)
4625 kHz
69th Communications Hub
Intelligence briefRF forces
The Buzzer (UVB-76)
Sudak Communications Center
Intelligence briefRF forces
military unit 52917
Command and Control of UVB-76
"The Pip" Transmitting Radio Center
Intelligence briefRF forces
5448 kHz/3756 kHz
"The Pip" Receiving Radio Center
Intelligence briefRF forces
5448 kHz/3756 kHz
Transmitting Radio Center (Yegoryevsk-6) HQ
Intelligence briefRF forces
military unit 48905
Transmitting Radio Center (Yegoryevsk-6)
Intelligence briefRF forces
military unit 48905
Transmitting Radio Center
Intelligence briefRF forces
military unit 61240
Long-Range Navigation Radio Station RSDN-10 «Tropik»
Intelligence briefRF forces
military unit 18330