Indian Navy's mini sub rescues 'stranded' submarine crew in South China Sea | WATCH Tiger X completed successful dockings with submarines from South Korea and Singapore in the South China Sea. New Delhi:The Indian Navy successfully deployed its Deep Submergence Rescue Vehicle (DSRV) Tiger X during the multinational submarine rescue exercise XPR-25, hosted by the Singapore Navy. Marking the system’s first-ever operation beyond the Indian Ocean Region, Tiger X completed successful dockings with submarines from South Korea and Singapore in the South China Sea. Exercise XPR-25 brought together over 40 navies, with a focus on enhancing global cooperation in submarine rescue. Tiger X docks with South Korean and Singaporean SubmarinesOn September 23, Tiger X, India’s advanced mini-submarine designed for deep-sea rescue, made its maiden dive outside Indian waters.