In 1971, a Pakistani submarine sank an anti-submarine ship on india's doorstep, killing 194 Indian sailors. The angry Indian army rushed out, but what was surprising was that the submarine returned to the base unscathed after dodging 36 rounds of attacks and 156 depth charges!
In November 1971, East Pakistan fell into civil unrest, India took advantage of the offensive, and the Third Indo-Pakistani War broke out. Due to the full preparation, the Indian army made rapid progress on land, and the offensive at sea was also extremely fierce.
On December 5, the Indian Navy launched Operation Trident, sending three Mosquito-class missile boats to infiltrate the port of Karachi in the middle of the night to launch a surprise attack. This missile boat with a displacement of only 75 tons fired 6 Styx anti-ship missiles in a row, sinking the Pakistani destroyers "Zhbel" and "Venus Challenger" freighters, and seriously injuring the destroyer "Rajahan". Before retreating, the last two Stygian missiles were used to destroy a large oil depot, reducing the port's fuel reserves by 70%
After the Pakistani army suffered heavy losses, it quickly organized a counterattack and dispatched the "Mujahideen" submarine to hunt down the opponent's flagship, the aircraft carrier Vikrant. Who knew that the Indian army had long been prepared, they launched a large number of fake radio communications, disguised as an aircraft carrier formation.
The Mujahideen, who did not know the truth, broke into the ambush circle and was sunk by a depth charge bomb. After successive great victories, the Indian army triumphantly dispatched the aircraft carrier formation and basically grasped the control of the sea.
At this time, the only thing that the Pakistani Navy can still fight is the "Hanguo", which is a "Goddess" class diesel-electric submarine, with a maximum underwater speed of 13 knots, but a diving depth of up to 300 meters, and 12 torpedo tubes, which can launch 550 mm heavy torpedoes.
In order to break the sea blockade, the "Hango" began to attack alone, under the command of the captain Colonel Tasnim, and quietly sailed to the vicinity of the Indian port of Dice, preparing to hunt down the opponent's ships leaving the port.
On 7 December, five Indian warships sailed out of the harbor and headed north, apparently to attack the port of Karachi. The Hanguo immediately pursued, but had a helpless underwater speed of only 12 knots, and soon lost its target.
So the "Hanguo" resolutely surfaced and issued an early warning telegram. The Indian army has more than 20 electronic signal monitoring stations on the shore, and this telegram was intercepted as soon as it was sent, and the technicians locked the position of the "Hanguo" through the principle of "triangular positioning".
Only then did the Indian army discover that there was actually a Pakistani submarine hidden near the base camp! It's so dangerous to pull it out no matter what. So the two anti-submarine frigates quickly attacked and conducted a carpet search of the target sea
The two frigates, the Kukari and the Kilpan, have only been in service for 10 years, but due to poor maintenance, the ship's sonar system is severely aged, and the underwater detection distance is only a pitiful 1,000 meters.
But the Indian army is not afraid, after all, continuous victories, morale is high, and it is fighting at the doorstep of the home, there are still 5 "Sea King" anti-submarine helicopters in the sky to assist in the battle, which can be described as taking advantage of the time and place, searching for a conventional submarine, is not ready to capture?
Therefore, after reaching the target sea, the frigate did not use a safe "Z" type anti-submarine route, but drove in a straight line at an interval of 500 meters, which greatly improved the search efficiency.
But the two ships were too close, and the engine noise mixed together, creating a huge sound wave, so that the "Hanguo" found them in the distance. At this time, there are two options in front of Captain Tasnim, the first is to sneak away under the cover of noise; The second is to take the risk of attacking with 1 against 2.
Fleeing was obviously the safest course of action, but the Pakistani army needed a victory to boost morale in the face of consecutive crushing defeats. Tasnim thought for a moment and gave a bold order - to surface and quietly follow the frigate, looking for an opportunity to kill the opponent!
In order to prevent the target from being lost again, Tasnim asked to detect it with radar every 30 minutes! The two frigates suddenly changed from hunters to prey, and the two sides began a dangerous "cat and mouse game"
After 12 hours of tracking, Tasnim found that his opponent was constantly circling in circles and the route was very fixed, so he calculated the position and ordered the submarine to turn off the engine and wait for the rabbit at the ambush point.
At this time, it was already 19:00 in the evening, and after dinner, the Indian sailors all took off their life jackets and relaxed on the deck, blowing the sea breeze and chatting with the sky, without the slightest awareness of the arrival of danger.
An hour later, the two ships drove unsuspectingly into the ambush circle, clearly appeared in the periscope, Tasnim ordered the dive to 50 meters, the torpedoman locked on to the target, and when the distance between the two sides was 3200 meters, decisively fired three E15 heavy torpedoes!
Due to the wrong depth of the first torpedo, it actually drilled through the bottom of the Kilpan, and the other two hit the target accurately, blowing the Kurik in two and disappearing from the sea after 5 minutes. Captain Nader refused to abandon the ship, smoking a cigar and sinking into the sea with 194 sailors.
The "Kilpan", which had escaped the disaster, immediately began to counterattack, throwing depth charges in the direction of the torpedo, but the "Hango" had already adjusted its attack position and quickly responded with a torpedo, the "Kilpan" could not dodge, was seriously injured, and under the cover of anti-submarine helicopters, it was difficult to withdraw from the battlefield.
Two frigates were at the doorstep of their homes, and they were beaten and seriously injured, and the Indian commander was furious and ordered the anti-submarine troops to rush out to intercept and kill! After the "Hanguo" withdrew from the battlefield, it did not flee directly north to return to the base, but turned around and turned south, choosing to take a detour and return.
This move was much unexpected by the Indian army, so in the next few days, they found the trail of the "Hanguo" several times, but they could not lock the exact position, launched 36 rounds of attacks, and dropped 156 depth charges, all of which were fruitless.
On December 14, after a detour of hundreds of nautical miles, the Hango arrived at the port of Karachi, and all the crew received heroic courtesy. Because of their wit and bravery, they not only regained confidence in the Pakistani army, but also disrupted the deployment of their opponents and failed their strategic maritime objectives.
In 2017, the "Hanguo" has long been retired to commemorate this meritorious submarine. The Pakistani side will purchase 8 S-20 conventional submarines from China, named the Hanguo class, and the first one is named the "Hanguo" to show the inheritance of the navy's fighting spirit and glorious tradition!
