On 21 April 2021, Indonesian Navy spokesperson First Admiral Julius Widjojono announced that KRI Nanggala had failed to report for a post-maneuver brief following a torpedo live fire exercise in the Bali Sea off the coast of Surabaya, about 95 km (51 nautical miles) north of Bali, in an area where the water is 700 meters (2,300 ft) deep.[47][48]