# India Expands Underwater Fleet with Submarines

> India plans six new submarines and three more Scorpene boats for Rs 80,000 crore underwater fleet expansion.
- Title: India Expands Underwater Fleet with Submarines | Shortify
- Summary: India plans six new submarines and three more Scorpene boats for Rs 80,000 crore underwater fleet expansion. India is finalizing a Rs 80,000 crore deal to…
- Keywords: india, project-75i, scorpene, mazagon dock limited, defence secretary rajesh kumar singh, air independent propulsion, naval physical and oceanographic laborat, indian navy, underwater fleet, submarine, diesel-electric attack submarines, indigenous combat system
- Source: Financialexpress — https://financialexpress.com/business/defence/6-new-submarines-3-more-scorpenes-india-weighs-rs-80000-cr-underwater-fleet-expansion/4352831
- Author: Sheenu Sharma
- Published: 2026-10-03T08:56:44+00:00
- Read time: 1 min
- Topics: india, project-75i, scorpene, mazagon dock limited, defence secretary rajesh kumar singh, air independent propulsion, naval physical and oceanographic laborat, indian navy, underwater fleet, submarine, diesel-electric attack submarines, indigenous combat system
## India's Submarine Deal Progress
India is almost in the final stages of clearing an over Rs 80,000 crore deal to build six advanced conventional submarines domestically with German partnership.
## Additional Scorpene Submarines Considered
Defence Secretary Rajesh Kumar Singh says both Project-75(I) and additional Scorpene submarines are being considered.
## Project-75(I) Program Details
Project-75(I) is designed to deliver diesel-electric attack submarines with advanced sensors, weapons and stealth features.
## Scorpene-Class Submarines
The additional Scorpene order would extend the existing Kalvari-class line already under construction at Mazagon Dock Limited.
## Indigenous AIP System Upgrade
Indian Navy is working to fit indigenous Air Independent Propulsion system developed by DRDO onto Scorpene-class boats during mid-life refits.
## Indigenous Combat System Development
Naval Physical and Oceanographic Laboratory has developed an indigenous integrated combat system for submarines to be phased in during refits.
## Strategic Partnership Model
Project-75(I) uses strategic partnership model with German firm TKMS for domestic construction with substantial Indian private-sector participation.
## Key takeaway

India is finalizing a Rs 80,000 crore deal to build six advanced submarines domestically with German partnership and considering three additional Scorpene submarines to strengthen underwater capabilities.