Sagardhwani

INS Sagardhwani is a marine acoustic research vessel owned by the Naval Physical and Oceanographic Laboratory (NPOL) of the DRDO and operated by the Indian Navy. The ship is specifically designed to conduct oceanographic and acoustic research in the Indian Ocean and adjacent waters. It plays a vital role in gathering underwater acoustic data to support naval operations and scientific research.

Constructed by Garden Reach Shipbuilders & Engineers in Kolkata, the vessel was launched in May 1991 and officially commissioned into the Indian Navy in July 1994. Over its decades of service, Sagardhwani has undertaken numerous scientific expeditions, including collaborative oceanographic studies with neighboring nations. In 2019, the ship embarked on the 'Sagar Maitri' mission to promote scientific cooperation in the Indian Ocean Region, and it remains active in its research role.