USHUS (sonar)

USHUS is an Integrated Submarine Sonar System developed by the Naval Physical and Oceanographic Laboratory (NPOL) of the Defence Research and Development Organisation (DRDO) of India and manufactured by Bharat Electronics Limited (BEL). It has been developed for use in submarines of the Indian Navy, especially for Sindhughosh-class submarines. Some reports also suggest that Arihant-class nuclear ballistic missile submarines are also equipped with USHUS system. USHUS replaces Russian systems like MGK-400 and MGK-519 sonars on Indian submarines.