INS Kalvari (Scorpène / Project 75) Attack Submarine
WEAPON SYSTEM OVERVIEW
Project 75 Kalvari-class comprises six advanced stealth attack submarines built at Mazagon Dock Shipbuilders in Mumbai under technology transfer from France's Naval Group. Incorporating acoustic stealth hydrodynamics, rubber-cushioned machinery mounts, and advanced SUBTICS combat management, the Kalvari-class is engineered for silent hunter-killer operations across the Indian Ocean.
STRATEGIC DETERRENCE & COMBAT ROLE
Operating across maritime choke points such as the Malacca, Sunda, and Lombok Straits, the Kalvari-class provides critical submerged deterrence. The integration of DRDO's indigenous Air-Independent Propulsion (AIP) module during major refits will allow these submarines to stay submerged for up to two weeks without surfacing.
OPERATIONAL DEPLOYMENT & COMMAND FOOTPRINT
Submarine Squadrons based at INS Vajrabahu (Mumbai) and INS Virbahu (Visakhapatnam).
TECHNICAL SPECIFICATIONS MATRIX
| Displacement | 1,615 tonnes (Surfaced) / 1,775 tonnes (Submerged) |
| Diving Depth | >350 meters operational depth |
| Submerged Speed | 20 knots (37 km/h) |
| Armament | 6 x 533mm Torpedo Tubes (SM39 Exocet Missiles / SUT Heavyweight Torpedoes) |
| Weapons Payload | 18 Torpedoes / Missiles or 30 Sea Mines |
| AIP Upgrade | DRDO Fuel-Cell based AIP Plug (extends submerged endurance to 14+ days) |