1971年,印度与巴基斯坦之间在东巴解放战争之间的紧张局势日益紧张,巴基斯坦海军在一个高级秘密任务中计划袭击印度雄伟级航空母舰INS Vikrant,以控制孟加拉湾的水域 。 他们派出一流的潜艇PNS Ghazi(加齐号/勇士号),但被印度潜艇INS Karanj(S21)拦截。 随后发生水下攻击。In 1971, amid rising tensions between India and Pakistan over the liberation war of East Pakistan, Pakistan navy, in a top secret mission, plans an attack on Indian majestic-class aircraft carrier INS Vikrant, to gain control over the waters of Bay of Bengal. They send their best-in-class submarine PNS Ghazi, but are intercepted by an Indian submarine INS Karanj (S21). An underwater attack ensues.