India and Pakistan have fought four wars with each other.
But there was one battle not many have heard about...
...off the shores of Visakhapatnam, in the depths of the ocean.
In 1971, East Pakistan engaged in violent protests seeking an independent Bangladesh.
Unable to control the situation, Pakistan imposed a military regime.
Fearing for their lives, lakhs of people fled East Pakistan...
...and took refuge at the Indian border.
This led to Pakistan turning more hostile towards India.
Angered by the increasing support for an independent Bangladesh...
...the Pakistan army went on a killing spree of innocent people.
'All India Radio. News broadcast by Saroj Kuppuswami.'
'The tension that arose during the East Pakistan elections turned violent and is at the verge of becoming a war.'
'The Prime Minister of Pakistan claims India has a role in instigating this violence.'
'Prime Minister Indira Gandhi has vehemently denied the allegation...'
'and also says that if West Pakistan incites violence, the Indian Armed Forces will be ready to retaliate.'
Are we going to have a war, father?
Do you have to leave now?
I am not leaving.
Didn't you just hear that?
This is between East and West Pakistan.
Vizag is far away.
We don't have to worry.
The Prime Minister's order is clear.
We should never lose control over the rebels in East Pakistan.
In that case, we should continue providing supplies to our Army.
I wanted to discuss it with you.
We have a geographical disadvantage.
East Pakistan is landlocked by India on all three sides.
It is impossible to send army supplies via land or air.
We cannot enter the Indian airspace.
The only option is the sea route.
We can tackle the Indian fleet.
But the INS Vikrant...
You know it is their most deadly weapon.
Equipped with the best of resources, the INS Vikrant will block all sea-routes to East Pakistan.
We have to draw out a plan to sink the INS Vikrant.
That won't be easy.
I don't deny that.
And that's why we need to send our best team on this mission.
If we fail, we'll go with Plan B.
We'll plan a surprise attack on an Indian port.
They will turn their attention to defending the port.
This will clear the sea route.
We have decoded the intercepted message.
'Store 2075 TH Hydraulic oil in ample quantities.'
We use this only in specialised naval vessels.
When was this message relayed?
About 36 hours back from Karachi to Chittagong.
Chittagong in East Pakistan can be used for an attack on Paradip,Visakhapatnam, Madras or Port Blair.
They must be planning a swift and high-sea surprise attack.
We should have increased surveillance here.
What is the status of the East zone naval vessels?
The S-21 is under the command of Capt. Rann Vijay Singh, and you know him well.
I do, but what choice do we have?
We can't operate the way we did in 1965.
If Capt. Rann Vijay Singh gets even a whiff of the enemy...
...he will forget it is just a search operation and initiate an attack without our permission.
Where is Lieutenant Commander Arjun?
500 km from Visakhapatnam port...
80 degree East...
600 Nautical miles down...
Up to 18 degree North...
...this is the area of our operation.
This is just a passive mission. It is enough if you gather intelligence.
If you spot the enemy, report it and wait for our orders.
If I sight the enemy, should I stick to just reporting that?
Yes.
The headquarters will give you instructions time to time.
This mission will be called 'Operation Sea Sight'.
I will be back soon.
We are going to have a baby after all these years.
Do you have to go now?
I have to do my duty.
The baby is due in four days.
Have you decided on the name? -That's her decision.
Where is the assigned officer?
You know Capt. Rann Vijay Singh well.
At no cost can we initiate an attack.
That is your responsibility.
Will he take long?
No, we have to wait for our Lieutenant Commander.
Don't just think about feeding yourself.
Think about the others too.
The orders can be found in the locker and these are the keys.
I hope you won't need to use the torpedo key.
A cyclone warning has been issued.
Between longitude 85 and latitude 76...
Fantastic!
The enemy won't approach us from there.
If they come from any other side, they won't return.
"We are sons of this sea, we survive in these waters."
Why do you have this rope tied?
It will indicate at what depth the submarine is.
Let me explain.
My training kit for the new-comers is ready with me.
Don't trouble him.
Think of the egg as the submarine and the water as the ocean.
The S-21 is designed to dive to 250 metres.
But they say it can dive to 350 metres.
No one has done that till now.
Can you imagine the pressure of water on the submarine at that depth?
A weight of 2 lakh tonnes...
Everything is going smoothly.
Right now?
But, the crew hasn't settled down yet.
Will the enemy wait for the crew to settle down before they attack?
It's stuck. Get the hose from the seventh compartment.
Hurry up!
You are not fit to ride even a bullock-cart.
Give them some time, they will learn.
It is this reckless behaviour that led him to assault two subordinates and get suspended for two years.
Even that hasn't changed him.
He won't change.
The men he slapped were the ones who won medals later.
He won't do anything wrong.
In every step he takes he has the best interests of our country in mind.
General Patton, an inspiration to every soldier.
They even made a movie about him.
It won the Oscar this year. Did you watch it?
No, I haven't.
But I've heard about his temper and that he takes tough decisions.
The decisions may be tough, but they've never failed.
War is not about losing your life for your country.
It is about taking the enemy's life and winning for your country.
If we change course now and head to the location given in the order, it will take us two days.
Everything is going as per plan.
Rahim crossing Ravan...
Sir, underwater hills....
We are on a safe route.
We've reached the location.
There is no contact in our sonar range.
This area is secure.
There is no contact in our sonar range.
No signals here either.
Can we say 'Operation Sea Sight' has been completed?
Come on, guys.
I have good news.
Our first mission is a success.
Get ready to head home.
Cheer up, buddy.
Let's start your wedding celebrations right away!
The Director of RAW sent me to convey an important message.
We've got intelligence reports from Karachi.
The Pakistan navy have planned to launch an offensive mission against India.
According to sources it might be Vikrant.
Submarine Ghazi has set sail from Karachi. Commander Razzak is leading it.
In the 1965 war, Pakistan's entire naval fleet was covered only by Ghazi.
With its speed, range, endurance, armament...
...our submarines could neither match Ghazi nor its Commander Razzak.
They have given us the wrong information.
INS Vikrant is not in those coordinates...
It's just an Indian merchant ship.
INS Vikrant not being there does not make the information wrong.
The enemy could have thought ahead of us and changed their course.
What do we do now?
We have to divert the attention of the Indian Navy.
What happened? -Strange echoes.
We can hear abnormal sounds from above.
Do you detect anything in our sonar range?
Is the enemy such a coward, that he'll attack a merchant ship?
We can't spot the enemies anywhere.
That doesn't mean that there are no enemies.
Officer Arjun is in the water.
Some civilians were drowning.
He has dived in to save them.
If we wait beyond 90 seconds, we will become target practice for the enemy.
Sir, we don't have time.
We've got clearance to move forward.
'Lines from the Bangladesh National Anthem...'
Kamalakar, take her inside.
We can't attack until we get clearance.
How many more lives should we sacrifice waiting for your clearance policy?
Send the clearance policy to Islamabad along with a bouquet.
And, send the uniform of our martyred soldiers too, as a gift.
We can't attack based on assumptions. We need proof to attack.
This could be an accident. How can you be sure that it was an attack?
There could be other reasons like inflammables, gas leakage, anything...
Our actions can't be based on our instincts.
Who are you?
We are refugees.
Why did you sing the Bangla rebel anthem when you entered?
We thought this was a Pakistani submarine.
They'd think you are rebels and shoot you immediately.
They would have killed us even if we didn't say anything.
But, they would have raped me and then...
Singing this song infuriates them. They would have killed me immediately.
How did you know?
Ranjan has already broadcast this news.
He is lucky to be born on this side of the border.
We've checked both these locations.
The merchant ship was attacked at this location.
I have just had a baby boy.
Good, your wife didn't keep the baby on 'hold', unlike our government.
Don't have your attention diverted. There is plenty of work.
I don't understand.
This attack on the merchant ship is a diversion.
They want us to focus on this attack.
This means, they have another target.
Their target is Visakhapatnam.
Clean your ears.
There is sonar contact at 2000 metres.
We can't overrule our orders.
You better understand that I don't wait for anyone's orders.
The enemy is there. And he should not be.That's my rule.
This is my submarine and everyone follows my rules.
I've been sent to follow the rules of the Indian Navy, not yours.
This isn't the time to go by the books.
Our radio is down and enemy presence has been detected.
You should be following the Captain's orders at a time like this and I am your Captain.
You are a senior naval officer and you know the importance of discipline in the armed forces.
Discipline is the only thing that differentiates us from rogue forces.
This small slip can trigger an Indo-Pak war.
And as per rules you can't fire without a joint order.
He is right. We need to have a joint order.
Else, we cannot proceed.
So, you always follow rules?
We need his permission to fire a torpedo. Right?
But, do I need permission to conduct a drill?
I don't want you to become a 'rogue' force. This is just an emergency practice drill.
This is not right.
I am following the rules of the S-21.
You know this is wrong.
I don't decide what is right or wrong.
I just have to follow the rules.
As per rules, I have to implement the Captain's orders.
Please remember this.
Not every solider will get an opportunity like this.
Victory...
I have a few words to share...
Victory won't come looking for us.
We have to strive hard to achieve it.
That's what we are going to do now.
The torpedo is 300 meters away from us.
There was no contact.
By what margin did we miss it?
200 metres.
There is a clever man on the other side as well.
What is the range of correction?
200 metres.
They will definitely know that we fired a torpedo.
The target range decreased because both of us are in a straight line.
That's why we missed it.
If we dive a further 80 metres and fire, the enemy submarine's entire base will fall in our range.
Can they detect us at that depth?
Sir, you're risking everyone's lives.
Don't go near the pipes.
The pressure can make the bolts shoot out.
This drill has to be terminated immediately.
Iqbal, are you all right?
If you don't terminate this drill, I can cite contingency rules and take over this submarine.
I need the Captain's order.
We cannot stop this dive.
Go ahead, shoot.
The kitchen is completely burnt down.
We have to surface immediately.
Surface the submarine.
After the smoke clears, we will dive again.
The Indian submarine has been located.
It is 2000 metres away from us.
They are at this point...
...and we are here.
We are in Indian waters.
They will definitely take this route.
They have to cross this range of hills.
Should we attack?
Definitely.
But not predictably.
When the Indian submarine goes past the underwater hills...
...let us give them a warm reception.
Plant mines between the hills.
When the Indian submarine approaches, there will be contact with the mines.
His blood is boiling with anger.
Do you know how to give first-aid?
I am a doctor.
This is where we are.
If we turn by 80 degrees...
The Indian submarine hasn't taken the course we expected it to.
Why would they?
You just called them over for a feast.
You didn't send them a formal invite.
Let them know where we are.
I will ask them.
She is hungry.
Sorry, I was caught up in the emergency drill.
This is all we have.
Thank you for saving us.
If you'd also insisted he follow orders, this wouldn't have happened.
Not every decision turns out right.
Irrespective of the decision, it is our duty to always follow orders.
Chandan Singh followed orders too.
Our Commander's only son...
He was serving at the Poonch sector in the 1965 war.
Enemy mobilisation was detected and the plan was to attack at dawn.
They wanted orders to launch a surprise attack at night to vanquish the enemy.
They kept sending radio messages to the headquarters through the night.
The headquarters passed an order to only defend and not to attack.
After three days... we received the bodies.
Thirty bullets were recovered from each body.
The medals followed.
We won't return till we destroy the Pakistani submarine.
Try to stop me if you can.
If you even think of pointing the gun at him...
...I will arrest you on the grounds of being a troublemaker.
I don't care even if they court martial me.
Sir, listen to this.
Sonar contact is at centre 900 and left 1100...
We have to hunt down the Pakistani submarine.
Radio communication is down.
We don't have food supplies.
Will our brave men die if they go without food for two days?
How long will it take to reach the port?
26 hours.
Let's go.
Let us inform the Base about the presence of enemies.
Echoes keep resonating from these locations.
The enemy might be on the other side.
We will get some clarity if we cross the hills.
I think we should also check this location.
We need three hours for checking and another 26 hours to reach a port.
We have civilians with us.
We have a child with us and there is no food.
Give the food to the civilians.
Going without food for 29 hours won't kill us.
He's talking like me.
The Captain's gun belongs only to the Captain.
When we go through hills, the echoes should grow louder from the starboard or the port.
But in this case, it is increasing in the centre.
Sonar, confirm whether the Indian submarine has been completely destroyed.
What happened?
We can detect only up to 300 meters and there is no contact up to that.
This means the Indian submarine has been destroyed.
This is just the beginning.
The real victory is only when Visakhapatnam disappears from the Indian map.
Long live Pakistan!
Are you all right?
Take him to the cabin.
Hurry up. We have to close the hatch.
Hurry up!
Hurry up, Sir.
If we don't stop the torpedo's propeller, the submarine will explode.
I fixed the torpedo but I couldn't stop the water flow.
Take it to the seventh compartment.
He needs immediate surgery.
I've administered anaesthesia.
How is he?
You have to take control of the submarine.
The batteries are down and the pressure pumps are not working.
Our men are still getting the water out of the battery room.
Where are the blueprints?
We can use ballast pumps from the battery room to the torpedo tube.
We can use high pressure to drain the water.
We haven't received any contact signal from S-21.
Only two batteries are working.
How long will they last?
For about 25 mins after which only the emergency lights will work.
The port propellers are damaged and can't be fixed.
We can't move back and forth without the propeller.
But, we can go up using compressed gas.
Apply emergency pressure.
Check for mines in our path.
Is the radio up and working?
Internal circuits are fine. The problem may be with the external antenna.
There is another mine.
The coordinates indicate that it is not in our way, not a problem.
Officer Devaraj is conscious.
Everything is under control.
The bad news is that our Captain is no more...
I saw it happen.
He gave his life to save you.
We have to pay homage to our Commander.
"He who utters the name of Lord..." "rises victorious."
"Praise our Lord." "Praise our Lord."
"He who is pure at heart..." "will attain victory."
He wanted to bury the enemy in the sea... but now we are burying him instead ...
He knew what it was to be a true soldier.
Who is a soldier?
If a farmer in our country tends to his harvest without fear...
It's because he knows the Armed Forces are protecting the borders.
If a mother is at peace sending her children to school...
It's because she knows we are safeguarding the border.
If every citizen works hard, fearlessly, striving for a better future for his children...
It is because they know that we are and will continue protecting the border.
A true Indian soldier is one who upholds their belief.
Do you remember our Captain's words?
War is not about sacrificing your life for the country.
It is about slaying the enemy's life and winning for your country.
The enemy is in our territory and he is eyeing our country.
He is trying to trample on our self-respect and pride and enter our country.
Can we allow that to happen?
No. We won't allow that.
We should build a tomb for them in these waters.
We will kill everyone.
Let us feed them as prey to the fish in these waters.
We have to avenge our Captain's death and only then return home.
This is a classified mission.
We won't win rewards or recognition.
We may not feature in History.
But we will figure in the future of Visakhapatnam and the future of India.
You are senior in rank.
You should be the Captain now.
We don't decide that.
I cannot accept that.
You know this submarine better than him.
Headquarters has designated Officer Arjun with special powers.
I have accepted him as our Captain.
You have to accept him too.
Don't bring this up again.
Our submarine can only go up and down.
We cannot chase them. What do we do?
They planted mines to destroy us.
Let us use those mines to bring them to our location.
This is our submarine at 200 metres and the mine is at 170 metres.
We have to get to 170 metres and set off the mine.
The enemy will approach us to inspect the damage.
As soon as they are in the firing line, we have to launch the torpedo.
We can't wait for too long expecting their arrival.
We have just two batteries and we can't fire the torpedo without battery power.
We can manually fire the torpedo using compressed gas.
Give more pressure.
This is the second blast. How is it possible within 20 minutes?
It means the Indian submarine has not been destroyed fully.
Shall we inspect the submarine or shall we head towards Visakhapatnam?
We are faced with the same problem always.
All right, tell me which one you want to destroy first.
Will they come to check?
Let's wait and watch.
We are getting closer.
They are nearing the firing line.
Let them reach 700 metres. It will be a sure shot then.
If exploding the second mine was their plan they are expecting us now.
The first rule of war is not to go with what they are expecting us to do.
They have changed their course suddenly.
They are here and have not taken the expected course.
But the problem is... We are in the firing line now.
The Indian Submarine is at a distance of 650 metres but they are not moving.
Load the torpedo in tube 1... -Yes, Sir.
They've fired the torpedo.
It was a narrow escape.
The torpedo missed the target.
What's their current depth? -200 metres and they are diving further.
Launch two torpedoes.
At what depth are we?
They have launched another torpedo.
Take the submarine up to 150.
With just one air-pressure unit working, we need more time to go up.
Just do it. We have no other option.
They are rising to 200 meters again, still within the range of our first torpedo.
The torpedoes missed contact.
Both torpedoes missed contact.
At what depth are they?
They are at 170 metres and still rising.
They are on the right track. They can only go up.
They are now at 170 metres.
If they go up at the same speed, they can rise up to 150 metres. Torpedo 1.
If they go up at full speed, they can rise up to 100 metres. Torpedo 2.
If they reverse and dive further, they will be at a depth of 200 metres.
Torpedo 3.
The Indian submarine cannot escape our torpedoes.
Load all the torpedoes.
They've launched three torpedoes at depth 100... 150... 200.
It's very close. Anything can happen.
They've dived to 125 metres depth.
Hold onto something for support.
All three torpedoes missed contact.
The submarine keeps going up and down!
Is he a Commander or an elevator operator?
This isn't over yet.
They can't locate us at 350 metres.
350 metres down is the sea bed.
The battery units may fail any moment.
They are going down again.
We have fired all our 'aft torpedoes'.
If we have to launch the 'forward torpedoes', we have to turn 180 degrees.
They would by now know that we can't go back and forth.
How do we bring them within the firing line?
They are at 150 metres depth and have turned off their engines.
They've fired all their 'front torpedoes'.
To attack again they must turn 180 degrees and come towards our port.
They will be in the firing line of our 'rear torpedoes'.
In case they turn 180 degrees and come in front of us, we have to fire from our first compartment.
That is impossible because the compartment is full of water.
Power supply and oxygen levels are going down.
We don't have much time.
But, the enemy doesn't know that.
'Crew singing an Indian patriotic song.'
The British were right about them.
'Indian National Anthem.'
'Long live India.'
What's their depth?
Enough of playing 'hide-and-seek.'
Before they come up with a move, tilt the submarine by 20 degrees and attack them from the front.
They are turning... 180 degrees starboard...
You were right, they are turning towards the starboard.
How will we launch our forward torpedoes?
The Indian submarine is coming up at full speed.
Program our torpedoes immediately.
Take your firing positions.
Lock the hatch immediately.
Don't open till the service is complete.
We will be at their depth in 2 minutes.
If you're inside that long, you might die.
If I don't do this, we will all die.
Open the hatch. Come on, quickly.
They've launched their torpedo.
Shall I open the hatch?
If our Captain were alive he would have been proud of you, Captain Arjun.