Parchim-class corvette

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Indonesian corvette KRI Untung Surapati and RBU-6000 anti-submarine rockets
Class overview
Name	Parchim class
Builders	Peene-Werft, Wolgast
Operators	Volksmarine  German Navy  Soviet Navy  Russian Navy  Indonesian Navy
Built	1985–1989
Completed	28
Active	14 active in Indonesia, 6 active in Russia (Baltic Fleet)
Retired	2 (Indonesian Navy) 6 (Russian Navy)
General characteristics
Type	Anti-submarine corvette
Displacement	800 tons standard, 950 tons full load
Length	72 m (236 ft 3 in)
Beam	9.40 m (30 ft 10 in)
Draught	4.60 m (15 ft 1 in)
Installed power	14,250 hp (10,630 kW)
Propulsion	3 shaft M504 diesels
Speed	24.7 knots (45.7 km/h)
Range	2,100 nmi (3,900 km) at 14 knots (26 km/h; 16 mph)
Complement	80
Sensors and processing systems	Radar: Positive-E, Spin Trough Bass Tilt Hull Mounted Medium Frequency Sonar
Armament	1x twin 57 mm gun AK-725 1x twin 30 mm gun AK-230 2x SA-N-5 MANPAD positions 2x RBU-6000 anti submarine depth charge rocket launchers 4x 400 mm torpedo tubes 12 depth charges

The Parchim-class corvette, Soviet designation Project 1331M, was developed for the East German Navy in the late 1970s, and built by the Wolgast Peene-Werft. The ships were designed for coastal anti-submarine warfare. In case of an all-out NATO-Warsaw Pact war in Europe their prime targets would have been the small U-206 coastal submarines of the West German navy. The first ship, Wismar (now the Indonesian KRI Sutanto), was launched on 9 April 1981 in Rostock, and subsequently another 15 ships were built until 1986. To make production more economical, the Soviet Union agreed to purchase another 12 ships from Wolgaster Peenewerft built between 1986 and 1990, thereby effectively subsidising the East German shipbuilding industry.

The ships of the Soviet Navy were named Parchim II by NATO. Though useful as a coastal ASW platform, the Soviet production of the similar but far more powerful Grisha class made this purchase even more illogical for the Soviet Navy. After German re-unification, some of the former East German ships were used briefly by the unified German Navy^[1] before all of them were sold to the Indonesian Navy in 1993. The Indonesian Navy extensively refurbished their Parchims, to the point where the refurbishing exceeded the cost of purchase. They are still in service, both in the Indonesian Navy and in the Russian Baltic Fleet.