With very limited battery support, Arjun instigates Ghazi into attacking by transmitting his crew singing 'Saare Jahaan Se Achchha' and the Indian National Anthem. S21 dives to 350m so that it is no longer within Ghazi's sonar range despite being designed for a maximum of 250m depth. Six torpedoes fired by Ghazi are avoided by S21 through depth changing manoeuvres.
