Class overview
Name	Arnala-class corvettes
Operators	Indian Navy
Preceded by	Bathurst class Flower class
Succeeded by	Durg class
In commission	1968–2003
Planned	11
Completed	11
Lost	1
Retired	10
General characteristics
Type	Anti-submarinecorvette
Displacement	950 tons (standard) 1,150 tons (full load)
Length	81.8 m (268 ft 4 in)
Beam	9.2 m (30 ft 2 in)
Draught	2.9 m (9 ft 6 in)
Propulsion	2 shaft CODAG, 2 gas turbines - 30,000 hp 1 diesel - 6,000 hp (4,500 kW)
Speed	30 knots (56 km/h)
Range	4,870 nmi (9,020 km) at 10 knots (19 km/h) 450 nmi (830 km) at 30 knots (56 km/h)
Complement	90
Sensors and processing systems	Radar: Don-2, Slim Net, Hawk Screech Sonar: Herkules hull-mounted & dipping active sonar
Armament	476mm guns (2 × 2) 4RBU-6000 anti-submarine rocket launchers 3 533mm torpedo tubes Depth charges, mines

Arnala class was an Indian designation for thePetya III-class vessels of theIndian Navy.^[1]

Although these vessels were classified as frigates in theSoviet Navy, they were classified by the Indian Navy as anti-submarinecorvettes due to their role and smaller size. Vessels of the class were named for Indian islands.

INS Kiltan (P79) andINS Katchall (P81) were part of the task force forOperation Trident during theIndo-Pakistan War of 1971.^[2][3]

The hulls of this class were of relatively inferior quality built only 5mm thick for use in theBaltic sea andBlack seas, compared to the rest of the Navy's mostlyBritish built ships which had 8mm thick hulls requiring the vessels to undergo major refit every 5 years to preventcorrosion. The Indian Navy constructed the Naval Dockyard atVisakhapatnam, primarily to serviceRussian vessels. But given the lack of engineering support from Russia there were inordinate delays in completing the servicing facility. This resulted in considerable delay of the second refit forINS Andaman (P74), which was in poor repair and subsequently was lost at sea in conditions, 140 miles (230 km) east ofVisakhapatnam on 21 August 1990 around 2:03 pm, where it was conducting anti-submarine exercises with five other Indian warships. The Andaman's loss cost the navy an estimated Rs 8 crore, including the initial cost of the ship and weapons on board, as well as the lives of 15 sailors.^[4][5]

The corvettes of this class constituted the 31st Patrol Vessel Squadron of the Eastern Naval Command and the 32nd Patrol Vessel Squadron of the Western Naval Command.^[6]

• Arnala-class corvettes
• Corvette classes
• Corvettes of the Indian Navy
• India–Soviet Union relations

• Articles with short description
• Short description is different from Wikidata
• Use dmy dates from December 2015
• Use Indian English from December 2015
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