From UPSC perspective, the following things are important :
Prelims level : INS Vagsheer
Mains level : Project P 75I
The sixth and last of the French Scorpene-class submarines, INS Vagsheer, was launched into water at the Mazagon Docks in Mumbai.
Launch of INS Vagsheer
- It was launched by Veena Ajay Kumar (wife of Union Defence Secretary), in keeping with the naval tradition of launch and naming by a woman.
- The six submarines were being built under Project-75 by the Mazagon Docks under technology transfer from the Naval Group as part of a $3.75-billion deal signed in October 2005:
- INS Kalvari was commissioned in December 2017;
- INS Khanderi in September 2019;
- INS Vagir in November 2020;
- INS Karanj in March 2021; and
- INS Vela in November 2021.
- P 75 is one of two lines of submarines, the other being P75I, as part of a plan approved in 1999 for indigenous submarine construction with technology taken from overseas firms.
- Vagsheer is named after the sand fish, a deep sea predator of the Indian Ocean.
- The first submarine Vagsheer, from Russia, was commissioned into the Indian Navy on December 26, 1974, and was decommissioned on April 30, 1997.
- The new Vagsheer will be officially named at the time of its commissioning.
- Vagsheer can take up to eight officers and 35 men.
- It is 67.5 metres long and 12.3 metres high, with a beam measuring 6.2 metres Vagsheer can reach top speed of 20 knots when submerged and a top speed of 11 knots when it surfaces
- It has four MTU 12V 396 SE84 diesel engines, 360 battery cells for power, and a silent Permanently Magnetised Propulsion Motor.
- The hull, fin and hydroplanes are designed for minimum underwater resistance and all equipment inside the pressure hull is mounted on shock-absorbing cradles for enhanced stealth.
- Vagsheer is a diesel attack submarine, designed to perform sea denial as well as access denial warfare against the adversary.
- It can do offensive operations across the spectrum of naval warfare including anti-surface warfare, anti-submarine warfare, intelligence gathering, mine laying and area surveillance.
- It is enabled with a C303 anti-torpedo counter measure system.
- It can carry up to 18 torpedoes or Exocet anti-ship missiles, or 30 mines in place of torpedoes.
- Its superior stealth features include advanced acoustic absorption techniques, low radiated noise levels, hydro-dynamically optimised shape.
- It has the ability to launch a crippling attack using precision guided weapons, underwater or on surface.
- Vagsheer will be commissioned into the Indian Navy’s Western Command after 12 to 18 months when sea trials end.
- It will be based with Western Naval Command, mostly in Mumbai.
- The submarine will undergo a very comprehensive and rigorous set of tests and trials, for more than a year, to ensure delivery of a fully combat worthy submarine.
Back2Basics: Various classes of Submarines in India
In maritime terms, a class of ships is a group of vessels that have the same make, purpose and displacement.
- Chakra Class: Under a 10-year lease from Russia since 2012
- Arihant Class: Nuclear-powered ballistic missile submarines
- Shishumar Class: Diesel-electric attack submarines Indian variant of the Type 209 submarines developed by the German Navy
- Kalvari Class: Diesel-electric attack submarines designed by French company DCNS
- Sindhughosh Class: Kilo-class diesel-electric submarines built with the help of Russia
- Scorpene-Class: French submarines that can undertake various types of missions such as anti-surface warfare, anti-submarine warfare, intelligence gathering, mine laying, area surveillance etc.