India is making significant strides in naval nuclear propulsion with the development of the CLWR-B2 reactor, which will power the upcoming S-5 class SSBNs and new SSNs. This fourth-generation reactor improves thermal efficiency and safety while eliminating the need for a land-based prototype, thanks to its reliance on the proven CLWR-B1 design. The integration of pump-jet propulsion enhances stealth and operational capabilities, allowing for greater endurance and speed. With these advancements, India is poised to enhance its second-strike nuclear deterrence and assert its maritime dominance in contested waters, marking a pivotal evolution in its undersea warfare strategy.