This record most plausibly refers to the headquarters-level submarine command of Russia’s Northern Fleet, centered on Gadzhiyevo on the Kola Peninsula rather than a single pier area. Local municipal reporting identifies Gadzhiyevo as the core submarine garrison, and TASS has described it as the main base of the Northern Fleet’s submarine forces. ([zato-a.ru](https://zato-a.ru/about/info/news/3469/))
Gadzhiyevo/Yagelnaya Bay is the Northern Fleet’s principal SSBN hub. TASS reported Borei-class boat Yuri Dolgorukiy joining the 31st Submarine Division at Gadzhiyevo in 2013, NTI places the Northern Fleet’s Delta IV force at Yagelnaya Bay, and open-source satellite analysis has documented continued investment in missile-handling and pier infrastructure there for Delta IV and Borei boats. ([tass.com](https://tass.com/russia/688134))
The command’s subordinate combat power is geographically distributed across several Kola bases, not only Gadzhiyevo. Public order-of-battle sources place the 24th Submarine Division at Yagelnaya Guba/Gadzhiyevo, the 11th Submarine Division at Zapadnaya Litsa, and the 7th Submarine Division at Vidyayevo/Ara Bay; TASS likewise lists Gadzhiyevo, Vidyayevo, and Zapadnaya Litsa among Northern Fleet submarine basing areas. Some placemarks in the source record therefore appear to be subordinate formations aggregated under the command, not co-located at one site. ([tass.com](https://tass.com/defense/1240017))
Open reporting links this command to both strategic deterrence patrols and under-ice Arctic operations. TASS reported Northern Fleet boats Tula, Novomoskovsk, and Severodvinsk conducting under-ice surfacing drills and weapons-employment research in the Arctic, and separately described Gadzhiyevo as the return base for planned Barents Sea patrols by strategic submarines. ([tass.com](https://tass.com/defense/1061451))
Not all subordinate elements fall under the same operational chain. Public reporting places the 29th deep-sea/special-purpose submarine formation at Olenya Guba, where Losharik and related motherships have been observed, but associates that force with GUGI control rather than ordinary fleet command; other open sources place the 339th separate submarine construction-and-repair brigade in Severodvinsk alongside the Belomorsk/White Sea support complex. This location record is therefore best read as a command umbrella spanning Gadzhiyevo HQ, special-mission basing at Olenya Guba, and industrial support in Severodvinsk. ([thebarentsobserver.com](https://www.thebarentsobserver.com/security/spy-sub-base-must-get-facelift-says-murmansk-governor/161069))