The Navy-BHA encounter saw the latter take the lead in the 18th minute when Sharda Nand Tiwari converted a penalty stroke.
Sunny Malik scored in the final minute to seal a victory and improve Navy's prospects of advancing to the semi-final.
Indian Army conceded a goal in the sixth minute when MHA's no.6 Roshan Keisham sounded the boards from a penalty corner.
However, the Army men scored almost immediately at the start of the second half and there seemed to be no stopping them from thereon.
The Army team pumped in five goals leaving the Mumbai HA defence in tatters.
Sajeed Dung Dung opened the account for them, from a penalty corner. Jitender increased the tally in the 44th minute, which was a field goal.
The Army side scored three more goals in the next 10 minutes (50th, 56th and 60th) to complete an authoritative victory.
Biraj Ekka, Gurpreet Singh and Sarin were the ones to find the back of the net.
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