India's iterative frigate-building strategy

How do India's Project 17 frigates and proposed Project 17B develop the roles of earlier ships, and how do the new corvettes compare?

Successive frigate designs add domestic building experience and stronger task-group, air-defence, and anti-submarine capabilities; the new corvettes receive no settled assessment.

India's frigate development combines operational growth with a gradual expansion of domestic building capability. The Russian-built Talwar class is described as an initial technological foundation and a means of providing diplomatic presence. The Shivalik class, Project 17, developed domestic construction, followed by the Nilgiri class, Project 17A, and the proposed Project 17B. The later ships are intended for task groups, with greater air-defence capability and a strong anti-submarine role, while retaining presence duties. Their design is judged to put considerable emphasis on firepower alongside reduced signatures. Production at Mazagon Dock and Garden Reach Shipbuilders and Engineers provides continuity across successive designs. The answer leaves the new corvettes open because their programme is still being studied.