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India's Indigenous AIP System for Submarines
Air Independent Propulsion (AIP) is the fuel-cell system developed by DRDO that lets the Indian Navy's diesel-electric submarines stay submerged longer by easing their need for atmospheric oxygen. It is in the news because the second Setting to Work phase of its Energy Module began on 24 October 2026 at Larsen & Toubro's Hazira complex in Gujarat, ahead of fitment on a Kalvari-class submarine in early 2027.
Last updated 26 October 20263 min read
Latest update
New card on India's fuel-cell AIP for diesel-electric submarines, now in its second Setting to Work phase and due on a Kalvari-class boat in early 2027.
- AIP
- Air Independent Propulsion
- NMRL
- DRDO
- Kalvari class
- submarine
- fuel cell
- Project 75
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