Why in News:
- The sixth and last of the French Scorpène-class submarines, INS Vagsheer, was launched into water at the Mazagon Docks Limited (MDL) in Mumbai.
- The six submarines were being built under Project-75 by the MDL under technology transfer from the Naval Group under a $3.75 bn deal signed in 2005. The first one, INS Kalvari, was commissioned in 2017; the second, INS Khanderi, in 2019; the third, INS Karanj, in March 2021; and the fourth one, INS Vela, joined service in November 2021. The 5th one, INS Vagir, was launched in November 2020 and is undergoing sea trials.
- The Navy has drawn up plans to install an Air Independent Propulsion (AIP) module on all the Scorpenes as they go for refit, beginning with INS Kalvari, in the next couple of years to enhance their endurance.
- AIP allows a non-nuclear submarine to operate without access to atmospheric oxygen
What are Scorpene-class submarines?
- They are the most advanced conventional submarines with superior stealth features, such as advanced acoustic silencing techniques, low radiated noise levels and ability to attack with precision-guided weapons on board.
- They were designed by French naval shipbuilding firm DCNS in partnership with Spanish shipbuilding firm Navantia.
- These are used in the missions such as area surveillance, intelligence gathering, anti-submarine warfare, anti-surface warfare and minelaying operations.
- It can carry upto 6 torpedoes and 18 heavy weapons.
- With 350 meters diving depth, it can travel upto 20 knots speed (37.04 kmph) and submerged upto 21 days.
About Project 75I
- Indian Navy’s Project 75I (P75I) is the development of Scorpene submarine development for six latest-generation attack submarines.
- It is expected to be completed by 2022.
- The project is taking shape at Mazagon Dock in Mumbai.