Navy Day And Killer Day: Six Missiles That Won The Indian Navy The Iconic Operation Trident

PNS Khaibar

During the 1971 Indo-Pak War, the Indian Navy carried out Operation Trident on December 4 -- a historical victory for India

Navy Day is observed on the 4th of December every year to pay homage to the magnificence and achievements of the guardians of our seas. Since India's independence, the Indian Navy has toiled tirelessly to secure the nation's vast maritime frontiers, and we are glad that we have a strong history of celebrating the daring mission that our naval forces carried out.

But do we know Operation Trident and the valorous efforts that helped India win the 1971 Indo-Pak War well enough?

Amidst Indo-Pak tensions, Pakistani aircraft attacked 6 Indian airfields on the evening of December 3.

The Ghazi Attack

War was thus declared, and a special strike group of Indian Navy warships was formed with the objective of attacking Pakistani Navy's headquarters and Pakistan's primary maritime trading hub-- Karachi.

Killer Day

The day before Navy Day is actually celebrated as 'Killer Day'. Read on to find out how this day got coined.

Planned Mission

The Indian Navy planned the attack at night as Pakistan did not have aircrafts that could carry out bombings at night

The Indian attack consisted of 3 Vidyut-class missile boats, 2 anti-submarines and a tanker

Vidyut-Class Missile Boats


Around 2 pm on December 4, 1971, Indian Navy's fleet sailed from Okha Port in Gujarat, 40 miles to the south of Karachi

Around 10:30 pm, the fleet was ready for combat

First Win

At 10 pm, one of the lieutenants saw INS Nipat's radar beeping, which indicated that two enemy warships were closing in

INS Nirghat fired two missiles at what was Pakistani destroyer PNS Khaibar and sunk it

Meanwhile, INS Nipat fired missiles and sunk merchant ship MV Venus Challenger, which was carrying ammunition for the Pakistani army and air force

Second Win

INS Nipat targeted an oil depot in Karachi harbour, setting it ablaze

PNS Khaibar/ wrecksite.eu

As Pakistani vessels approached, INS Veer fired its first missile onto a Pakistani minesweeper, Muhafiz -- sinking it with the entire crew.

Success and Return

In all, there's a lot to be proud of:

In 90 minutes, the Indian Navy fired 6 missiles that sunk 4 enemy vessels and destroyed Karachi's oil storage facility

With the mission a success, the strike group sped back towards the Indian port of Mongrol

As the fleet was returning to Mumbai from Mongrol, one sailor climbed up the missile hanger on INS Nipat and wrote 'killers' on it in red paint

The squadron was thereafter christened 'The Killers' and Killer Day has been celebrated by the Indian Navy on December 3 ever since

The Best Part

Although 5 Pakistani sailors and over 700 men were injured, there were no Indian casualties.

Today, we have a very well-prepared fleet

Currently, the Navy operates some of the most modern ships and submarines besides maritime patrol aircraft.

As of this year, the Indian Navy is equipped with:

1 Aircraft Carrier
1 Amphibious transport dock
8 Landing ship tanks
11 Destroyers
14 Frigates
1 Nuclear-powered Attack Submarine
1 Ballistic missile submarine
13 Conventionally-powered attack submarines
24 Corvettes
4 Mine countermeasure vessels
10 Large offshore patrol vessels
4 Fleet tankers and various auxiliary vessels
90 - 100 Armed Patrol ships of various sizes


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