The Indian Navy is set to integrate its first indigenous air-independent propulsion (AIP) system into the INS Khanderi by July 2026, marking a significant step in indigenisation. Developed by the Defence Research and Development Organisation (DRDO) with industry partners L&T and Thermax, the prototype is expected to be ready by December 2023. The integration process will conclude by July 2027, with initial sailing trials commencing in March-April 2027. This development positions India among a select group of nations that have successfully created their own fuel cell-based AIP technology, enhancing the operational capabilities of its submarine fleet and bolstering national security.