INS Sindhudhvaj is a submarine of the Indian Navy, specifically a Kilo-class submarine. It was commissioned in 1986 and has been an essential part of India's underwater defense capabilities. The submarine is designed for anti-submarine warfare, intelligence gathering, and surveillance missions. The name "Sindhudhvaj" translates to "Flag of the Sea" in Sanskrit. This submarine is equipped with advanced sonar systems and torpedoes, allowing it to operate effectively in various maritime environments. It plays a crucial role in enhancing India's naval strength and ensuring maritime security in the region.