Whakaotihia te rerenga e whai ake nei: I te marama o Noema, 1971, kei te tata haere a Inia me Pakisitana ki te whakapuaki pakanga ki a raua ano, hei hua o te
he raru rerenga i whakaohohia e te ope taua o Pakistan i raro i te Operation Searchlight. Ko te Navy Indian me te RAW te wetewete i tetahi waehere muna i tukuna mai i Pakistan ki East Pakistan (Bangladesh o enei ra), e pa ana ki te whakaeke pea ki tetahi kaipuke moana o Inia. Ka whakaarohia e te Navy ko te whaainga pea ko te "INS Vikrant", ko te kaipuke rererangi anake o Inia. Ka tukuna e te mana o runga te kaipuke moana "S21", i raro i te mana o Cmdr. Ranvijay Singh mo nga misioni aroturuki. Hei whakaiti i nga ahuatanga whawhai a Singh, ka tukuna e te Indian Navy Admiral a Lt. Cmdr Arjun Varma ki te "S21", me nga whakahau kia kore e aro atu a Singh ki nga kaipuke Pakistani me te whakaoho i te pakanga.