Summary:

- The Indian Navy is considering the use of pump-jet propulsion for its future nuclear-attack submarines (SSNs). This technology offers improved underwater performance and stealth compared to traditional propeller-based systems.

- The navy is evaluating both indigenous pump-jet technology as well as a French-developed system for potential integration on the upcoming SSN program. The choice between local and foreign technology will depend on factors like performance, cost, and technology transfer.

- Adopting pump-jet propulsion could provide the Indian Navy's SSNs with enhanced maneuverability, reduced noise, and better high-speed underwater capabilities - crucial attributes for modern nuclear-powered attack submarines.