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About Kalvari
The Kalvari class is a class of submarines based on the Scorpène-class submarine being built for the Indian Navy. It is a class of diesel-electric attack submarine.
Khanderi and Vikrant
- The second Scorpene submarine will begin sea trials on June 1.
- As for the construction of the first indigenous aircraft-carrier Vikrant, it would start trials in 2019 and take delivery in 2020.
More about INS Khanderi
- The state-of-the-art features in the submarine include superior stealth and ability to launch a crippling attack on the enemy using precision guided weapon.
- The attack from it can be launched with torpedoes, as well as tube-launched anti-ship missiles, whilst on surface or underwater.
- The stealth features gives it invulnerability, unmatched by many submarines.
- The submarine is designed to operate in all theatres, including the tropics.
- All means and communications are provided to ensure interoperability with other components of a Naval task force.
- It can undertake multifarious types of missions typically undertaken by any modern submarine such as anti-submarine warfare, anti-surface warfare, intelligence gathering, area surveillance, mine laying etc.
Scorpene submarines
- The Scorpène-class submarines are a class of diesel-electricattack submarines jointly developed by the French Direction des Constructions Navales (DCN) and the Spanish company Navantia, and now by DCNS.
- It features diesel propulsion and an additional air-independent propulsion(AIP).
Project 751-class submarine
- The Project 75I-class submarine is follow-on of the Project 75 Kalvari-class submarinefor the Indian navy.
- Under this project, the Indian Navy intends to acquire 6 diesel-electric submarines, which will also feature advanced Air Independent Propulsion(AIP) systems to enable them to stay submerged for longer duration and substantially increase their operational range.
- The P-75I submarines will be more modern and advanced with all of them equipped with Air Independent Propulsion modules to enhance the reach and stealth characteristics.



