India has deployed indigenous sonars on board two newly inducted warships- the guided-missile stealth frigate INS Dunagiri and the anti-submarine warfare shallow water craft INS Agray- which were commissioned in Kolkata on 21 st June 2026, carrying more than 75% indigenous equipment. The sonar systems have been designed by the Naval Physical and Oceanographic Laboratory, Kochi, of DRDO, and are manufactured by Bharat Electronics. INS Dunagiri is fitted with the HUMSA system known as HUMSA-2020, which is otherwise known as HUMSA-NG Mk II, employing contemporary electronics architecture for the purpose of long-range underwater detection and target acquisition capability. It has already undergone laboratory, factory, and ship-acceptance tests, and the sonar systems have been successfully accepted for deployment on board Indian Naval platforms.
INS Agray is equipped with Abhay PG shallow-water sonar suite. It is a light, hull-mounted suite that is meant for service in the littoral zones, where underwater terrain variations, reefs, shallow waves reflection and civilian ships produce lots of underwater acoustic clutter and acoustic interference. The sonar suite will be installed on 16 shallow water boats. It is to act as the underwater ‘ears and eyes of vessels’ to help track, classify and hunt submarines and other underwater threats, thereby aiding its anti-submarine warfare (ASW) capabilities, while minimizing India’s dependence on foreign sensors.
