India’s ambition to grow its navy past 200 ships within the next decade has taken on fresh urgency as China expands the world’s largest naval fleet and Pakistan adds advanced Chinese-built attack submarines, heightening New Delhi’s anxieties in the Indian Ocean. Analysts see this month’s commissioning of the stealth frigate INS Mahendragiri and submarine hunter INS Malvan this month as a symbol of that effort: both domestically built warships presented as evidence that New Delhi can scale up its...