Project 257D

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Project 257D
Project 257DM
Project 257DM
Ship data
country Soviet UnionSoviet Union (naval war flag) Soviet Union Russia
RussiaRussia (naval war flag) 
Ship type Anti-mine vehicle
Shipyard Shipyard 5 Leningrad
Shipyard 789 Petrozavodsk
Shipyard 602 Vladivostok
Construction period 1959 to 1972
Units built 73
period of service 1963 to 2012
Ship dimensions and crew
length
40.5 m ( Lüa )
width 7.7 m
Draft Max. 2.1 m
displacement 260 t (project 257D)
270.1 t (project 257DM)
 
crew 32
Machine system
machine 2 × M870 marine diesel
Machine
performance 		2 × 1200 PS (882 kW )
Top
speed 		14 kn (26 km / h)
propeller 2
Armament
Sensors
  • Navigation radar Don
  • Sonar MG-25, MG-69

Project 257D ( NATO designation: "Vanya class") was a class of mine clearance vessels of the Soviet Navy , which were intended for operations in the coastal apron. 73 ships were built by the Soviet Union.

description

Project 257D was the first type of anti-mine vehicle developed in the Soviet Union to combat magnetic ground mines from 1957. Two designs were considered, the hulls of which should not generate a magnetic field strong enough to trigger these mines. Project 257D was made of wood , Project 257M was made of weak magnetic steel. The serial production of Project 257M failed for technical reasons, so from 1959 Project 257D boats with wooden hulls were built. In contrast to its predecessor, Project 265, the magnetic field has been reduced by 50 times.

The minesweeping equipment used proved to be of limited use: only narrow strips of the seabed could be scanned with the active sonar , so the search operations took a very long time. The underwater cameras could only make out mines in clear waters. From 1961 onwards, Project 257MD was built, the hull of which was made of wood and fiberglass and the more modern mine detector could be used.

The ships were armed with a 30 mm L / 63 AK-230 turret on the forecastle. Up to twelve sea ​​mines could also be carried.

Whereabouts

A total of 61 ships from projects 257D and 257DM were built by the Soviet Union. In addition, a test vehicle project 257W and four units project 257DME. In addition, in some publications there is the modernized Project 699 with five ships and Project 1253W, a lead ship for radio remote control of the small mine hunters of Project 1253 with two units.

Six ships went to Bulgaria . There are no more ships of the class in service, the Soviet / Russian ships were decommissioned until 1994, the last Bulgarian ship went out of service in 2012. The Soviet Union surrendered two of its ships to Syria in the 1980s .

literature

  • Ю.В.Апальков: Корабли ВМФ СССР. Том IV - Десантные и минно-тральные корабли. Saint Petersburg, 2007, ISBN 978-5-8172-0135-2 . (Russian)

Web links

Individual evidence

  1. ↑ a b Ю.В.Апальков: Корабли ВМФ СССР. Том IV - Десантные и минно-тральные корабли. Saint Petersburg 2007, ISBN 978-5-8172-0135-2 , p. 102 and following.
  2. ↑ a b Project 257 at russianships.info
  3. ↑ Jane's Information Group: Jane's Fighting Ships 1997. 1997, ISBN 0-7106-1546-9 , p. 684.