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Russian Navy Sorum-class seagoing tug MB-99 (Project 745) during the Navy Day celebrations at Vladivostok in 2008
Class overview
NameSorum class
Builders
Operators
In commission1972
Completedc. 43[1]
General characteristics (Project 745)
TypeSeagoing tug
Displacement1,452 t (1,429 long tons; 1,601 short tons)
Length56.5 m (185 ft 4 in)
Beam12.64 m (41 ft 6 in)
Draft4.47 m (14 ft 8 in)
Installed power
  • 2 main diesel gensets (2 × 1,000 kW)
  • 2 auxiliary diesel gensets (2 × 100 kW)
Propulsion
IEP; two shafts:
2 × DC propulsion motors[2] (2 × 1,500 PS or 1,480 shp)
SpeedMax: 13.2 knots (24.4 km/h; 15.2 mph)
Range6,200 nmi (11,500 km; 7,100 mi) at 13 kn (24 km/h; 15 mph)
Endurance40 days
Complement35
Sensors and
processing systems
Armament
One unit since 2015:
2 × twin 12.7 mm Utyos-M machine gun turrets[b]

The Sorum class, Soviet designation Project 745, is a series of seagoing tugs built for the Soviet Navy and KGB Border Troops, and later operated by the Russian Navy and FSB Border Service.[3]

These vessels perform the standard missions of a seagoing tugboat with other missions such as protecting and patrolling Russian maritime borders, enforcing navigational rules and law enforcement, search and rescue, and fisheries protection.

Design

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Project 745 seagoing tug
The oceangoing tugs are auxiliary vessels for the Soviet Navy, later the Russian Navy.[4][1]
Project 745P patrol ship
The border patrol ships are modified versions of the original Project 745. They are armed with two 30 mm AK-230M or AK-306[c] gun mounts giving them the ability to fire on surface, air and ground targets, and are equipped with the Kolonka-1 fire-control system to control these weapons.[5][1]
Project 07452 experimental vessel
The reconnaissance vessel is a version of the original Project 745, which is a testbed for SIGINT and hydroacoustic equipment.[1]
Project 745MB seagoing tug
The oceangoing tug is a modernized version of the original Project 745. It is equipped with two main diesel gensets (2 × 1,500 kW), three auxiliary diesel gensets (2 × 200 kW + 1 × 100 kW), an asynchronous propulsion motor (1 × 2,720 PS or 2,680 shp) and a bow thruster.[6][2][1]
Project 745MBS rescue tug
The rescue tug is a SAR version of the modernized Project 745MB, which is equipped with a switched reluctance propulsion motor instead of an asynchronous one.[2][1]

Externally, the Projects 745MB and 745MBS tugs can be distinguished from the original Project 745 tugs by twin funnels instead of one.

  • Russian Navy Project 745 seagoing tug MB-307 in the North Atlantic Ocean in 1993
    Russian Navy Project 745 seagoing tug MB-307 in the North Atlantic Ocean in 1993
  • Ukrainian Navy Project 745 seagoing tug Korets and Gyurza-M-class gunboat Berdiansk (U175) in the Black Sea in 2016
    Ukrainian Navy Project 745 seagoing tug Korets and Gyurza-M-class gunboat Berdiansk (U175) in the Black Sea in 2016
  • Russian Coast Guard Project 745P border patrol ship Zabaykalye in the western Pacific in 1992
    Russian Coast Guard Project 745P border patrol ship Zabaykalye in the western Pacific in 1992
  • Russian Coast Guard Project 745P border patrol ship Bug and Type Yamaha border patrol boat Steregushchy during the Russian-Japanese exercise in Aniva Bay in 2009
    Russian Coast Guard Project 745P border patrol ship Bug and Type Yamaha border patrol boat Steregushchy during the Russian-Japanese exercise in Aniva Bay in 2009
  • Soviet Navy Project 07452 experimental vessel OS-572 (de facto reconnaissance vessel)
    Soviet Navy Project 07452 experimental vessel OS-572 (de facto reconnaissance vessel)
  • Russian Navy Project 745MB seagoing tug MB-12 at Cape Zhelaniya in 2020
    Russian Navy Project 745MB seagoing tug MB-12 at Cape Zhelaniya in 2020
  • Russian Navy Project 745MBS rescue tug Viktor Konetsky and IRIS Shahid Mahdavi (P313-1) during the CHIRU exercise in 2019
    Russian Navy Project 745MBS rescue tug Viktor Konetsky and IRIS Shahid Mahdavi (P313-1) during the CHIRU exercise in 2019

History

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A Project 745P border patrol ship was involved in an incident involving Greenpeace vessel where the Russian ship fired warning shots, and later seized a Greenpeace vessel after they attempted to board an oil rig in the Arctic in 2013.[7]

Another Project 745P border patrol ship rammed a Ukrainian tug in the Kerch Strait on November 25, 2018.[8]

See also

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Notes

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  1. ^ One unit (ex-Soviet Navy seagoing tug MB-26) that was scrapped in 2019.[1]
  2. ^ a b One unit (Ukrainian Navy seagoing tug Korets, ex-Soviet Navy MB-30) that was captured by the Russian Armed Forces in the Port of Berdiansk during the Russian invasion of Ukraine on February 28, 2022.[1]
  3. ^ The last five of nineteen built.[1]

References

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  1. ^ a b c d e f g h i Russianships.info.
  2. ^ a b c Grigoryev 2023, p. 120.
  3. ^ Polmar 1986.
  4. ^ Polmar 1986, pp. 9, 82, 322.
  5. ^ Polmar 1986, pp. 9, 385.
  6. ^ Zelenodolsk Shipyard.
  7. ^ "Russia 'seizes' Greenpeace ship after Arctic rig protest". BBC News. 23 September 2013. Retrieved 29 June 2017.
  8. ^ "Navy tugboat Yani Kipi vs Russian coastguard". liveuamap. Retrieved 25 November 2018.

Further reading

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