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17 Nov, 2020

3 Min Read


GS-III : Internal security Security Forces & Agencies


  • Indian Navy’s fifth Kalvari-class Diesel Electric attack submarine INS Vagir was launched recently at Mazgaon Dock in Mumbai.
  • The other vessels in the class are INS Kalvari, INS Khanderi, INS Karanj, INS Vela and INS Vagsheer.

About Kalvari Class of Submarines

  • This class of submarines have Diesel Electric transmission systems and these are primarily attack submarines designed to target and sink adversary naval vessels.
  • They can be used in anti-warship and anti-submarine operations, intelligence gathering and surveillance and naval mine laying.
  • These submarines are built under Project 75.
  • Being constructed by Mazagon Dock Ltd (MDL) in Mumbai.
  • Design is based on Scorpene class of submarines designed and developed by French defence major Naval Group formerly DCNS and Spanish state-owned entity Navantia.

Facts for Prelims:

  • Kalvari – means Tiger Shark.
  • Viagra has been named after a Sand Fish, a predatory marine species.
  • Khanderi has been named after an Island Fort built by Chhatrapati Shivaji, which played a key role in his Navy.
  • Karanj has also been named after an Island located South of Mumbai.

India's submarine fleet

  • India currently operates one submarine each in nuclear-powered Classes of Chakra and Arihant and in addition to 14 submarines belonging to 3 classes of Diesel Electric category — Kalvari, Shishumar and Sindhughosh.

Source: TH

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