French-designed diesel-electric attack submarines built under technology transfer in India as part of Project 75. The Scorpene is a modern conventionally-powered submarine optimised for coastal and deep-water operations including anti-submarine warfare, anti-surface warfare, intelligence gathering, mine laying, and special forces deployment. Displacement of 1,775 tonnes submerged with a length of 67 metres. Features an X-configured rudder for manoeuvrability, anechoic coating for acoustic stealth, and an advanced integrated combat management system. Armed with 6x 533mm torpedo tubes for heavyweight torpedoes and Exocet SM39 anti-ship missiles. The Indian Scorpenes incorporate indigenous systems including sonar, C4I, and periscopes. Crew of 31 with endurance of 50 days. Six boats building/commissioned: Kalvari, Khanderi, Karanj, Vela, Vagir, and Vagsheer. All boats commissioned by 2024. Project 75-India (P-75I) will procure additional advanced submarines with Air Independent Propulsion.
![Naval Group logo](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="200" height="60" viewBox="0 0 200 60"><rect width="200" height="60" fill="%23111"/><text x="100" y="38" font-family="Arial" font-weight="bold" font-size="16" fill="%23c8a84b" text-anchor="middle">NAVAL GROUP</text></svg>)
- Proven French design with excellent acoustic signature for stealth operations
- Technology transfer builds Indian submarine construction capability
- Modern combat management system and sensors
- Indigenous construction milestone — all 6 boats built in India
- No AIP — limited submerged endurance vs. modern AIP submarines
- Six boats insufficient for India submarine force requirements (24 target)
- Exocet SM39 anti-ship missile integration still pending
- French technology dependency for major maintenance and upgrades
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