Marine acoustic research ship (MARS) - INS Sagardhwani A74, in Kolkata

From the archive record

INS Sagardhwani (A74) is a marine acoustic research ship (MARS) owned by the Naval Physical and Oceanographic Laboratory (NPOL), maintained and operated by the Indian Navy. The ship was built by Garden Reach Shipbuilders & Engineers, Kolkata, launched in May 1991, and commissioned in 1994. It is similar in design to the Sandhayak-class survey ships, but with the superstructure positioned amidships and a helipad forward. Internally, the ship has eight laboratories for various scientific disciplines, and a mini-operating theatre with medical staff. At the stern is handling equipment for mooring and retrieving oceanographic and acoustic buoys. It can accommodate up to 82 persons, including 16 scientists, and a crew of 8 officers and 58 sailors. Source: everything.explained.today/ This footage