Naval Systems

Project 07452 Chusovoy intelligence ship

Also known as
  • Chusovoy
  • Tchusovoy
  • RFS Tchusovoy
  • Project 07452
  • Project 0745 Sorum MOD
  • Project 07452 Sorum MOD
  • Sorum MOD
  • Mod Sorum
  • Project 07452 experimental vessel
  • hydroacoustic reconnaissance ship
  • OS-572
  • GS-31

Project 07452 Chusovoy is a Soviet-built, Russian Navy intelligence-gathering ship derived from the Sorum-class tug hull. Open sources identify the ship as OS-572, later GS-31 and Chusovoy, with a modified stern and towed hydroacoustic equipment for submarine acoustic-signature collection rather than a directly documented combat role.

Project 07452 Chusovoy intelligence ship, Intelligence-gathering ship, Naval Systems
Image source: OS-572 experimental vessel (DN-SN-89-06987).jpg
Profile / Specs

Profile

Origin
Soviet Union / Russia
Built in
Russia
Type
Intelligence-gathering ship
Service note
Cold War / post-Soviet service
Produced
1987
Number built
1
Developed from
Project 745 Sorum-class tug

Specifications

Project
Project 07452, modified Project 745/Sorum-class tug
Reported displacement
1,695 t (ESUT); Project 745 baseline listed as 1,092 t standard / 1,452 t full load by RussianShips.info
Length
59.1 m reported for Chusovoy by ESUT; 56.5 m Project 745 baseline by RussianShips.info
Beam
12.6-12.64 m
Draft
4.47-4.6 m
Speed
13.2 knots Project 745 baseline; 14 knots reported for Chusovoy by ESUT
Range
6,200 nmi at 13 knots Project 745 baseline; 3,500 nmi at 13 knots reported for Chusovoy by ESUT
Crew
60 reported for Chusovoy by ESUT; Project 745 baseline complement 35
Propulsion
2 x 1,500 hp PG-950/170M electric motors, 2 x 1,000 kW DGR-1000/750 diesel-generators, 2 x 100 kW diesel-generators, 1 fixed-pitch propeller in rotating nozzle
Electronics
2 Don navigation radars, MG-361 Kentavr/Kentavr-SK sonar, R-782-6-3.1 Buran-6 communication complex, and stern handling for towed sonar equipment
Defensive armament
RussianShips.info reports GS-31 was fitted with one 12.7 mm NSV-12.7 Utes and later two single 12.7 mm 6P59 Kord mounts
Carried Sonar

Chusovoy's documented electronics fit includes MG-361 Kentavr sonar.

Carried itemItem typeCarriage evidence
MG-361 Kentavr sonar, Towed hydroacoustic sonar system, Support EquipmentMG-361 Kentavr sonarTowed hydroacoustic sonar system

RussianShips lists MG-361 Kentavr sonar in Chusovoy's electronics fit.

Sources: Seagoing tug - Project 745

Hydroacoustic Reconnaissance Fit

Chusovoy is documented as a modified Sorum-class hull whose intelligence value comes from its aft sonar-handling arrangement and hydroacoustic equipment rather than from shipboard weapons.

Base hull

RussianShips.info lists Project 07452 as a one-ship branch of the Project 745/Sorum tug family built at Yaroslavl Shipyard.

Collection role

Janes identifies Tchusovoy as an intelligence-gathering platform for collecting acoustic signatures of Western submarines.

Stern equipment

ESUT describes the aft section as a distinctive structure used to deploy and house special towed-sonar equipment.

Sonar modernization

A Morskoy Sbornik article describes 2006-2008 work to modernize the MG-361/Kentavr-SK sonar installed on GS-31 with Minotavr apparatus.

Baltic sighting

Janes and ESUT both report a rare May 2024 Baltic transit toward Kronstadt; open reporting framed the voyage as repair, modernization, trials, or reconnaissance-related rather than verified combat use.

Sources: Rarely seen Russian intelligence-gathering vessel Tchusovoy spotted in Baltic; Seagoing tug - Project 745; Russian special unit for underwater reconnaissance in the Baltic Sea?; Morskoy Sbornik MG-361 modernization article.

Timeline

Project 07452 Chusovoy intelligence ship Key Events

  1. Commissioned as OS-572

    RussianShips.info lists the vessel as completed on 31 December 1987 before later renaming.

    Sources: Seagoing tug - Project 745

  2. Renamed GS-31

    The ship received the GS-31 designation in Russian service on 1 May 1998.

    Sources: Seagoing tug - Project 745

  3. Renamed Chusovoy

    RussianShips.info records the renaming to Chusovoy on 29 July 2007.

    Sources: Seagoing tug - Project 745

  4. MG-361 modernization tested

    A Morskoy Sbornik article describes 2006-2008 modernization work on the MG-361 sonar installed on GS-31, with shipboard testing of Minotavr apparatus reported in 2008.

    Sources: Morskoy Sbornik MG-361 modernization article

  5. Rare Baltic transit

    Janes reported the ship transiting the Great Belt toward Kronstadt on a rare visit to the Baltic Sea.

    Sources: Rarely seen Russian intelligence-gathering vessel Tchusovoy spotted in Baltic

  6. Reported arrival at Kronstadt

    ESUT reported that Chusovoy arrived at Kronstadt after the Baltic transit, with repair, modernization, sonar trials, and reconnaissance possibilities all discussed in open reporting.

    Sources: Russian special unit for underwater reconnaissance in the Baltic Sea?

Media

Project 07452 Chusovoy intelligence ship Images

Project 07452 Chusovoy intelligence ship, Intelligence-gathering ship, Naval Systems - view 1
Source: MB-307 oceangoing tug (DN-SC-94-00168).jpg
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Sources

Rarely seen Russian intelligence-gathering vessel Tchusovoy spotted in BalticPublisher: Janes | Note: Supports Chusovoy/Tchusovoy background, intelligence-gathering role, modified Sorum-class identity, Yaroslavl build context, 1987 service entry, towed-array arrangement, and May 2024 Great Belt transit. | Accessed: 2026-07-04Seagoing tug - Project 745Publisher: RussianShips.info | Note: Supports Project 07452 service chronology, shipyard context, dimensions, propulsion, range, complement, electronics, and renaming history. | Accessed: 2026-07-04Russian special unit for underwater reconnaissance in the Baltic Sea?Publisher: ESUT - Europäische Sicherheit & Technik | Note: Supports Chusovoy/GS-31 identity, Project 07452/Sorum MOD terminology, May 2024 Great Belt sighting, Northern Fleet/Severomorsk service context, modified stern and towed-sonar description, 2016 modernization statement, Kronstadt arrival, and Chusovoy-specific reported dimensions, displacement, speed, range, propulsion, and crew. | Accessed: 2026-07-04Morskoy Sbornik MG-361 modernization articlePublisher: Morskoy Sbornik | Note: Supports MG-361 installation on GS-31, Kentavr-SK terminology, and 2006-2008 Minotavr modernization and testing context for the ship's sonar fit. | Accessed: 2026-07-04OS-572 experimental vessel (DN-SN-89-06987).jpgPublisher: Wikimedia Commons | Note: Supports the public-domain image provenance for the ship photo. | Accessed: 2026-07-04MB-307 oceangoing tug (DN-SC-94-00168).jpgPublisher: Wikimedia Commons | Note: Public-domain image of a Project 745 Sorum-class tug used here as a class-representative gallery image for the Chusovoy family. | Accessed: 2026-07-04