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18th July 2022 (7 Topics)

Indian Navy’s INS Sindhudhvaj Decommissioned


The Navy’s Kilo-class submarine, INS Sindhudhvaj, has been decommissioned at Visakhapatnam after 35 years in service.


About INS Sindhudhvaj

  • Commissioned into the Navy in June
  • It was one of the 10 Kilo-class submarines India acquired from Russia between the year 1986 and 2000.
  • The submarine crest depicts a grey colour nurse shark and the name means flag bearer at sea.
  • Sindhudhvaj was the flag bearer of indigenisation and Indian Navy’s efforts towards achieving Atmanirbharat in the Russian built ‘Sindhughosh’ class submarines.
  • It was the only submarine to be awarded the Chief of Naval Staff (CNS) rolling trophy for Innovation by Prime Minister.
  • Key-features:
  • The submarines have a displacement of 3,000
  • It has a maximum diving depth of 300 meters, top speed of 18 knots, and they are able to operate solo for 45 days with a crew of 53.
  • It has anti-ship cruise missiles with a range of 220 km.
  • After the decommissioning of Sindhudhvaj, Indian Navy now has 15 conventional submarines in service.

What are kilo-class submarines?

  • Kilo is a class of diesel-electric attack submarines originally designed in the 1970s and built in the Soviet Union for the Soviet Navy.

Operations Credited to Sindhudhvaj

  • Operationalization of Indigenised sonar USHUS
  • Indigenised Satellite Communication systems Rukmani and MSS
  • Inertial Navigation System
  • Indigenised Torpedo Fire Control System

Sindhughosh class Submarines in India Navy

  • Sindhughosh-class submarines are Kilo-class diesel-electric submarines in active service with the Indian Navy.
  • Their names are mainly in Sanskrit.
  • The Sindhughosh submarines, were designed as part of Project 877, and built under a contract between Rosvooruzhenie (Russian firm) and the Ministry of Defence (India).

Some Submarines under Sindhughosh are;

  • INS Sindhudhvaj 
  • INS Sindhuratna
  • INS Sindhukesari

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