Hostilities broke out between India and Pakistan on 03 Dec 71. The twilight hours of 03 December turned out to be the dawning a new era for the Indian Navy. On the very night that hostilities commenced, with Pakistan bombing several air fields (03 Dec 1971), IN Ships Rajput and Akshay were leaving Vishakapatnam harbour when they obtained a sonar contact. They fired several depth charges, and proceeded on their mission when there was no further evidence of a submarine's presence. Thereafter a loud explosion was heard rattling windows panes off the Vishakapatnam beach. The Pakistani submarine Ghazi (a Tench class submarine obtained from the USA in 1964) had come to grief.