Indian Navy officers stand on INS Vagir, the fifth submarine of Project 75, during its commissioning ceremony at the Naval Dockyard in Mumbai, India, January 23, 2023. REUTERS/Niharika Kulkarni 

Admiral Radhakrishnan Hari Kumar, Chief of the Naval Staff, walks on INS Vagir, the fifth submarine of Project 75, during its commissioning ceremony at the Naval Dockyard in Mumbai, India, January 23, 2023. REUTERS/Niharika Kulkarni 

Indian Navy officers take pictures on INS Vagir, the fifth submarine of Project 75, during its commissioning ceremony at the Naval Dockyard in Mumbai, India, January 23, 2023. REUTERS/Niharika Kulkarni 

A view shows INS Vagir, the fifth submarine of Project 75, during its commissioning ceremony at the Naval Dockyard in Mumbai, India, January 23, 2023. REUTERS/Niharika Kulkarni 

Indian Navy officers stand on INS Vagir, the fifth submarine of Project 75, during its commissioning ceremony at the Naval Dockyard in Mumbai, India, January 23, 2023. REUTERS/Niharika Kulkarni 

Indian Navy officers and their family members stand on INS Vagir, the fifth submarine of Project 75, during its commissioning ceremony at the Naval Dockyard in Mumbai, India, January 23, 2023. REUTERS/Niharika Kulkarni 

Crew members of the Scorpene submarine of Project-75, named Vagsheer, attend its launch at the Mazagon Dock Shipbuilders Limited (MDL) shipyard, in Mumbai, India, April 20, 2022. REUTERS/Francis Mascarenhas 

The sixth and final Scorpene submarine of Project-75, named Vagsheer, is decorated before its launch at the Mazagon Dock Shipbuilders Limited (MDL) shipyard, in Mumbai, India, April 20, 2022. REUTERS/Francis Mascarenhas TPX IMAGES OF THE DAY 

The sixth and final Scorpene submarine of Project-75, named Vagsheer, is decorated before its launch at the Mazagon Dock Shipbuilders Limited (MDL) shipyard, in Mumbai, India, April 20, 2022. REUTERS/Francis Mascarenhas 

The sixth and final Scorpene submarine of Project-75 named Vagsheer is seen at the Mazagon Dock Shipbuilders Limited (MDL), in Mumbai, India, April 15, 2022. REUTERS/Francis Mascarenhas 

The sixth and final Scorpene submarine of Project-75 named Vagsheer is seen at the Mazagon Dock Shipbuilders Limited (MDL), in Mumbai, India, April 15, 2022. REUTERS/Francis Mascarenhas 

The sixth and final Scorpene submarine of Project-75 named Vagsheer is seen at the Mazagon Dock Shipbuilders Limited (MDL), in Mumbai, India, April 15, 2022. REUTERS/Francis Mascarenhas 

INS Kamorta, an anti-submarine corvette of the Indian Navy, is seen docked in Changi Naval Base during a visit to Singapore, May 10, 2018. REUTERS/Feline Lim 

India's third Scorpene-class submarine INS Karanj is seen silhouetted as a tugboat pulls it during its launch at the Mazagon Dock Ltd. naval shipbuilding yard, in Mumbai, India January 31, 2018. REUTERS/Shailesh Andrade TPX IMAGES OF THE DAY 

A tugboat pulls India's third Scorpene-class submarine INS Karanj during its launch at the Mazagon Dock Ltd. naval shipbuilding yard, in Mumbai, India January 31, 2018. REUTERS/Shailesh Andrade 

India's third Scorpene-class submarine INS Karanj is seen as a tugboat pulls it during its launch at the Mazagon Dock Ltd. naval shipbuilding yard, in Mumbai, India January 31, 2018. REUTERS/Shailesh Andrade 

India's third Scorpene-class submarine INS Karanj is seen silhouetted as a tugboat pulls it during its launch at the Mazagon Dock Ltd. naval shipbuilding yard, in Mumbai, India January 31, 2018. REUTERS/Shailesh Andrade 

A priest performs rituals before the launch of India's third Scorpene-class submarine INS Karanj at the Mazagon Dock Ltd. naval ship building yard, in Mumbai, India January 31, 2018. REUTERS/Shailesh Andrade 

Indian Navy's Scorpene submarine INS Kalvari is escorted by tugboats as it arrives at Mazagon Docks Ltd, a naval vessel ship building yard, in Mumbai, India, October 29, 2015. INS Kalvari will commence sea trials and will be commissioned into the Indian Navy by September 2016, according to a press release. REUTERS/Shailesh Andrade 

Indian Navy's Scorpene submarine INS Kalvari is escorted by tugboats as it arrives at Mazagon Docks Ltd, a naval vessel ship building yard, in Mumbai, India, October 29, 2015. INS Kalvari will commence sea trials and will be commissioned into the Indian Navy by September 2016, according to a press release. REUTERS/Shailesh Andrade TPX IMAGES OF THE DAY TPX IMAGES OF THE DAY

The China-funded "Colombo Port City" project, whose development is suspended, is seen in Colombo October 19, 2015. Sri Lanka would consider allowing Chinese naval ships to visit again but no request has been forthcoming yet, the country's defence secretary said on Sunday. Sri Lanka's previous government had caused concern in India with its close ties to Beijing, including allowing Chinese submarines to dock. New Sri Lankan President Maithripala Sirisena has unnerved China though with his re-examination of relations, including a $1.5-billion Chinese-invested "port city" project in the capital Colombo. REUTERS/Dinuka Liyanawatte 

The China-funded "Colombo Port City" project, whose development is suspended, is seen in Colombo October 19, 2015. Sri Lanka would consider allowing Chinese naval ships to visit again but no request has been forthcoming yet, the country's defence secretary said on Sunday. Sri Lanka's previous government had caused concern in India with its close ties to Beijing, including allowing Chinese submarines to dock. New Sri Lankan President Maithripala Sirisena has unnerved China though with his re-examination of relations, including a $1.5-billion Chinese-invested "port city" project in the capital Colombo. REUTERS/Dinuka Liyanawatte 

The China-funded "Colombo Port City" project, whose development is suspended, is seen in Colombo October 19, 2015. Sri Lanka would consider allowing Chinese naval ships to visit again but no request has been forthcoming yet, the country's defence secretary said on Sunday. Sri Lanka's previous government had caused concern in India with its close ties to Beijing, including allowing Chinese submarines to dock. New Sri Lankan President Maithripala Sirisena has unnerved China though with his re-examination of relations, including a $1.5-billion Chinese-invested "port city" project in the capital Colombo. REUTERS/Dinuka Liyanawatte 

German Defence Minister Ursula von der Leyen gestures as she answers a question from media after addressing a gathering during a lecture themed “India and Europe: A Shared Security?” in New Delhi, India, May 27, 2015. India remains interested in discussing a possible purchase of Eurofighter combat jets, Germany's defence minister said on a visit to New Delhi, while Berlin would also back a multi-billion-dollar plan to build half a dozen submarines. Prime Minister Narendra Modi, who has just marked his first year in office, broke an impasse over a troubled tender to buy high-end combat jets by announcing a deal in Paris last month to buy 36 Rafales from Dassault. REUTERS/Adnan Abidi 

German Defence Minister Ursula von der Leyen, gestures while addressing a gathering during a lecture themed “India and Europe: A Shared Security?” in New Delhi, India, May 27, 2015. India remains interested in discussing a possible purchase of Eurofighter combat jets, Germany's defence minister said on a visit to New Delhi, while Berlin would also back a multi-billion-dollar plan to build half a dozen submarines. Prime Minister Narendra Modi, who has just marked his first year in office, broke an impasse over a troubled tender to buy high-end combat jets by announcing a deal in Paris last month to buy 36 Rafales from Dassault. REUTERS/Adnan Abidi 

German Defence Minister Ursula von der Leyen, addresses a gathering during a lecture themed “India and Europe: A Shared Security?” in New Delhi, India, May 27, 2015. India remains interested in discussing a possible purchase of Eurofighter combat jets, Germany's defence minister said on a visit to New Delhi, while Berlin would also back a multi-billion-dollar plan to build half a dozen submarines. Prime Minister Narendra Modi, who has just marked his first year in office, broke an impasse over a troubled tender to buy high-end combat jets by announcing a deal in Paris last month to buy 36 Rafales from Dassault. REUTERS/Adnan Abidi 

German Defence Minister Ursula von der Leyen, gestures as she answers a question from media after addressing a gathering during a lecture themed “India and Europe: A Shared Security?” in New Delhi, India, May 27, 2015. India remains interested in discussing a possible purchase of Eurofighter combat jets, Germany's defence minister said on a visit to New Delhi, while Berlin would also back a multi-billion-dollar plan to build half a dozen submarines. Prime Minister Narendra Modi, who has just marked his first year in office, broke an impasse over a troubled tender to buy high-end combat jets by announcing a deal in Paris last month to buy 36 Rafales from Dassault. REUTERS/Adnan Abidi 

A Hindu priest performs a ritual to give blessings to Kavaratti, an anti-submarine warfare corvette for the Indian Navy built by Garden Reach Shipbuilders & Engineers Ltd. (GRSE), a warship manufacturing company, during its launch at a dockyard in Kolkata, India, May 19, 2015. REUTERS/Rupak De Chowdhuri 

An engineer of Garden Reach Shipbuilders & Engineers Ltd (GRSE), India's warship building company, checks the tap of an air pressure machine in the "Kadmatt", an anti-submarine warfare under construction, during a media tour at a dockyard in Kolkata April 22, 2015. REUTERS/Rupak De Chowdhuri

Employees of Garden Reach Shipbuilders & Engineers Ltd (GRSE), India's warship building company, disembark from the "Kadmatt", an anti-submarine warfare under construction, during a media tour at a dockyard in Kolkata April 22, 2015. REUTERS/Rupak De Chowdhuri

An engineer of Garden Reach Shipbuilders & Engineers Ltd (GRSE), India's warship building company, check a fire extinguishing system machine inside the "Kadmatt", an anti-submarine warfare under construction, during a media tour at a dockyard in Kolkata April 22, 2015. REUTERS/Rupak De Chowdhuri

Employees of Garden Reach Shipbuilders & Engineers Ltd (GRSE), India's warship building company, work in front of the "Kadmatt", an anti-submarine warfare under construction, during a media tour at a dockyard in Kolkata April 22, 2015. REUTERS/Rupak De Chowdhuri

Indian Navy's first Scorpene submarine is seen after being undocked from Mazagon Docks Ltd, a naval vessel ship building yard, in Mumbai April 6, 2015. Irked by India's status as the world's biggest arms importer, Prime Minister Narendra Modi wants to build an advanced defence industry but almost a year into his "Make in India" campaign, which aims to turn the country into a manufacturing powerhouse, not one large domestic weapons project has been awarded. Picture taken April 6, 2015. REUTERS/Shailesh Andrade

Employees stand around the Indian Navy's first Scorpene submarine before being undocked from Mazagon Docks Ltd, a naval vessel ship building yard, in Mumbai April 6, 2015. Irked by India's status as the world's biggest arms importer, Prime Minister Narendra Modi wants to build an advanced defence industry but almost a year into his "Make in India" campaign, which aims to turn the country into a manufacturing powerhouse, not one large domestic weapons project has been awarded. Picture taken April 6, 2015. REUTERS/Shailesh Andrade

Indian Navy's first Scorpene submarine is seen after being undocked from Mazagon Docks Ltd, a naval vessel ship building yard, in Mumbai April 6, 2015. REUTERS/Shailesh Andrade

Employees stand in front of the Indian Navy's first Scorpene submarine before being undocked from Mazagon Docks Ltd, a naval vessel ship-building yard, in Mumbai April 6, 2015. REUTERS/Shailesh Andrade

INDIA-CHINA/NAVY - Comparison of the Indian and Chinese submarine fleets. (SIN02) 

Indian Prime Minister Narendra Modi waves as he leaves after the commissioning ceremony of warship, INS Kolkata at a naval base in Mumbai August 16, 2014. According to a media release, the 163 meter long warship, with a cruise speed of 30 knots is equipped with latest telecommunication devices and armed with anti-air missiles and anti-submarine weapons. The warship weighs 7500 tonnes and has been constructed by the Mazagon Docks Ltd, Mumbai and designed by the Navy's Design Bureau. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY POLITICS MARITIME) 

Newly commissioned warship INS Kolkata is seen docked after its commissioning ceremony at a naval base in Mumbai August 16, 2014. According to a media release, the 163 meter long warship, with a cruise speed of 30 knots is equipped with latest telecommunication devices and armed with anti-air missiles and anti-submarine weapons. The warship weighs 7500 tonnes and has been constructed by the Mazagon Docks Ltd, Mumbai and designed by the Navy's Design Bureau. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY POLITICS MARITIME) 

Indian Prime Minister Narendra Modi walks down the gangplank of the newly commissioned warship, INS Kolkata, after its commissioning ceremony at a naval base in Mumbai August 16, 2014. According to a media release, the 163 meter long warship, with a cruise speed of 30 knots is equipped with latest telecommunication devices and armed with anti-air missiles and anti-submarine weapons. The warship weighs 7500 tonnes and has been constructed by the Mazagon Docks Ltd, Mumbai and designed by the Navy's Design Bureau. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY POLITICS MARITIME) 

Indian Prime Minister Narendra Modi walks down the gangplank of the newly commissioned warship, INS Kolkata, after its commissioning ceremony at a naval base in Mumbai August 16, 2014. According to a media release, the 163 meter long warship, with a cruise speed of 30 knots is equipped with latest telecommunication devices and armed with anti-air missiles and anti-submarine weapons. The warship weighs 7500 tonnes and has been constructed by the Mazagon Docks Ltd, Mumbai and designed by the Navy's Design Bureau. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY POLITICS MARITIME) 

Indian navy personnel wait for the arrival of Indian Prime Minister Narendra Modi for the commissioning ceremony of the warship INS Kolkata at a naval base in Mumbai August 16, 2014. According to a media release, the 163 meter long warship, with a cruise speed of 30 knots is equipped with latest telecommunication devices and armed with anti-air missiles and anti-submarine weapons. The warship weighs 7500 tonnes and has been constructed by the Mazagon Docks Ltd, Mumbai and designed by the Navy's Design Bureau. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY MARITIME POLITICS) 

An Indian navy serviceman walks down the gangplank of the newly commissioned warship, INS Kolkata, during its commissioning ceremony at a naval base in Mumbai August 16, 2014. According to a media release, the 163 meter long warship, with a cruise speed of 30 knots is equipped with latest telecommunication devices and armed with anti-air missiles and anti-submarine weapons. The warship weighs 7500 tonnes and has been constructed by the Mazagon Docks Ltd, Mumbai and designed by the Navy's Design Bureau. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY MARITIME) 

An Indian navy serviceman walks on the deck of the newly commissioned warship, INS Kolkata, during its commissioning ceremony at a naval base in Mumbai August 16, 2014. According to a media release, the 163 meter long warship, with a cruise speed of 30 knots is equipped with latest telecommunication devices and armed with anti-air missiles and anti-submarine weapons. The warship weighs 7500 tonnes and has been constructed by the Mazagon Docks Ltd, Mumbai and designed by the Navy's Design Bureau. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY MARITIME) 

An Indian navy serviceman walks down the gangplank of the newly commissioned warship, INS Kolkata, during its commissioning ceremony at a naval base in Mumbai August 16, 2014. According to a media release, the 163 meter long warship, with a cruise speed of 30 knots is equipped with the latest telecommunication devices and armed with anti-air missiles and anti-submarine weapons. The warship weighs 7500 tonnes and has been constructed by the Mazagon Docks Ltd, Mumbai and designed by the Navy's Design Bureau. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY MARITIME) 

An Indian navy serviceman boards the newly commissioned warship, INS Kolkata, during its commissioning ceremony at a naval base in Mumbai August 16, 2014. According to a media release, the 163 meter long warship, with a cruise speed of 30 knots is equipped with latest telecommunication devices and armed with anti-air missiles and anti-submarine weapons. The warship weighs 7500 tonnes and has been constructed by the Mazagon Docks Ltd, Mumbai and designed by the Navy's Design Bureau. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY MARITIME) 

An Indian navy serviceman boards the newly commissioned warship, INS Kolkata, during its commissioning ceremony at a naval base in Mumbai August 16, 2014. According to a media release, the 163 meter long warship, with a cruise speed of 30 knots is equipped with latest telecommunication devices and armed with anti-air missiles and anti-submarine weapons. The warship weighs 7500 tonnes and has been constructed by the Mazagon Docks Ltd, Mumbai and designed by the Navy's Design Bureau. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY MARITIME) 

Ships and submarines belonging to the Indian Navy are seen docked at the naval dockyard in Mumbai February 27, 2014. India's navy chief resigned on Wednesday, taking responsibility for a series of operational incidents, after smoke swept a submarine, forcing the evacuation of seven crew and leaving two officers dead, according to local media reports. REUTERS/Danish Siddiqui (INDIA - Tags: MILITARY DISASTER MARITIME) 

Navy divers and rescue workers stand on the INS Sindhurakshak submarine during a rescue operation at a naval dockyard in Mumbai August 16, 2013. India's navy said on Friday divers had found the bodies of three sailors who were on board a submarine badly damaged by a fire and explosions and that it was unlikely any of 15 other missing crew members would be found alive. REUTERS/Stringer (INDIA - Tags: DISASTER MILITARY) 

INDIA-SUBMARINE/FIRE - Illustrated table showing how India?s Kilo class submarine compares to others. (SIN02) 

India's Defence Minister A.K. Antony (front, 2nd L) speaks to Maharashtra's Chief Minister Prithviraj Chavan (front L) after attending a news conference at the Western Naval Command headquarters in Mumbai August 14, 2013. Divers were desperately trying to pry open the hatches of an Indian submarine in which several sailors died or were trapped after an explosion and fire on Wednesday in the navy's worst loss since the 1971 war with Pakistan. REUTERS/Danish Siddiqui (INDIA - Tags: DISASTER MARITIME MILITARY) 

Indian Navy personal and rescue workers stand on a dock at the naval dockyard in Mumbai August 14, 2013. Divers were desperately trying to pry open the hatches of an Indian submarine in which several sailors died or were trapped after an explosion and fire on Wednesday in the navy's worst loss since the 1971 war with Pakistan. REUTERS/Danish Siddiqui (INDIA - Tags: DISASTER MILITARY MARITIME) 

Indian Navy personnel and rescue workers stand on a dock at the naval dockyard in Mumbai August 14, 2013. Divers were desperately trying to pry open the hatches of an Indian submarine in which several sailors died or were trapped after an explosion and fire on Wednesday in the navy's worst loss since the 1971 war with Pakistan. REUTERS/Danish Siddiqui (INDIA - Tags: DISASTER MILITARY MARITIME) 

Indian Navy personnel and rescue workers stand on a dock at the naval dockyard in Mumbai August 14, 2013. Divers were desperately trying to pry open the hatches of an Indian submarine in which several sailors died or were trapped after an explosion and fire on Wednesday in the navy's worst loss since the 1971 war with Pakistan. REUTERS/Danish Siddiqui (INDIA - Tags: DISASTER MARITIME MILITARY) 

An elevated view shows the Indian Navy ships docked at the naval dockyard in Mumbai August 14, 2013. Eighteen Indian sailors were trapped and some were killed after an explosion and fire on the diesel-powered submarine INS Sindhurakshak berthed at a base in Mumbai on Wednesday, souring a week of naval milestones, including the launch of a locally built aircraft carrier. REUTERS/Vivek Prakash (INDIA - Tags: MILITARY DISASTER) 

An elevated view shows the Indian Navy ships docked at the naval dockyard in Mumbai August 14, 2013. Eighteen Indian sailors were trapped and some were killed after an explosion and fire on the diesel-powered submarine INS Sindhurakshak berthed at a base in Mumbai on Wednesday, souring a week of naval milestones, including the launch of a locally built aircraft carrier. REUTERS/Vivek Prakash (INDIA - Tags: MILITARY DISASTER) 

Ships and a submarine belonging to Indian Navy are seen docked at the naval dockyard in Mumbai August 14, 2013. Eighteen Indian sailors were trapped and some were killed after an explosion and fire on the diesel-powered submarine INS Sindhurakshak berthed at a base in Mumbai on Wednesday, souring a week of naval milestones, including the launch of a locally built aircraft carrier. REUTERS/Danish Siddiqui (INDIA - Tags: DISASTER MILITARY) 

An Indian Navy helicopter flies over the naval dockyard in Mumbai August 14, 2013. Eighteen Indian sailors were trapped and some were killed after an explosion and fire on the diesel-powered submarine INS Sindhurakshak berthed at a base in Mumbai on Wednesday, souring a week of naval milestones, including the launch of a locally built aircraft carrier. REUTERS/Danish Siddiqui (INDIA - Tags: DISASTER MILITARY) 

A man watches Indian Navy submarine INS Sindhurakshak on fire in Mumbai late August 13, 2013. An explosion on the Indian submarine on Wednesday killed crew members, India's defence minister said, giving no further details of what he described as one of the greatest tragedies of recent times. Picture taken late August 13, 2013. REUTERS/Vikalp Shah (INDIA - Tags: DISASTER MILITARY TPX IMAGES OF THE DAY) 

Armed personal stand guard outside a gate of the naval dockyard in Mumbai August 14, 2013. An explosion on Indian submarine INS Sindhurakshak on Wednesday killed crew members, India's defence minister said, giving no further details of what he described as one of the greatest tragedies of recent times. REUTERS/Danish Siddiqui (INDIA - Tags: DISASTER)