Mazagon Dock Shipbuilders

Indian ship and submarine company

Mazagon Dock Shipbuilders Limited

Formerly| Mazagon Dock Limited
Company type| Public

Traded as

| BSE: 543237
NSE: MAZDOCK
Industry| Shipbuilding
Founded| 1934; 91 years ago (1934)[1]
Headquarters|

Mumbai, Maharashtra

India

Key people

| Shri Biju George
(Chairman & MD)
Products| Naval ships
Submarines
offshore platforms
Tankers
Bulk carriers
Platform supply vessels
Patrol boats
Services| Ship design
Ship building
Ship repair
Revenue|  ₹11,431.88 crore (US$1.4 billion) (FY2025)[2][3]

Operating income

|  ₹3,228.80 crore (US$380 million) (FY2025)[3]

Net income

|  ₹2,324.88 crore (US$270 million) (FY2025)[3]
Total assets|  ₹29,448.81 crore (US$3.5 billion) (FY2024)[2]
Total equity|  ₹7,180.84 crore (US$850 million) (FY2025)[3]
Owner| Government of India (84.83%)

Number of employees

|  6327 (FY2024)[2]
Divisions| Shipbuilding, Submarine & Heavy Engineering
Website| mazagondock.in

Mazagon Dock Shipbuilders Limited (MDL) (IAST: Majhagānv Dawk Shipbuilders Limiṭeḍ), formerly called Mazagon Dock Limited,[4] is a company with shipyards situated in Mazagaon, Mumbai. It manufactures warships and submarines for the Indian Navy and offshore platforms and associated support vessels for offshore oil drilling. It also builds tankers, cargo bulk carriers, passenger ships and ferries.[5][1]

MDL is a public sector undertaking managed by the Ministry of Defence, with the Government of India holding an 80.82% stake.[6][7] Its shipbuilding segment has indigenously built stealth frigates, destroyers, guided-missile destroyers, corvettes, landing platform docks, missile boats, patrol boats, trailing suction hopper dredgers, cargo ships, cargo-passenger ships, platform supply vessels, Voith tugs and BOP vessels, while its submarine segment has built conventional submarines and stealth submarines. Both segments have also performed repair and refit activities.[8][9][10]

## History

[edit]

The company's shipyards were established in the 18th century. Ownership of the yards passed through entities including the Peninsular and Oriental Steam Navigation Company and the British-India Steam Navigation Company. Eventually, 'Mazagon Dock Limited' was registered as a public company in 1934.

The shipyard was nationalised in 1960 and is now a public sector undertaking (PSU) of the Government of India.[1] In 2024, it became India's 18th PSU to receive the Navratna status from the Indian government.[11]

Vice Admiral Narayan Prasad, AVSM, NM, IN (Retd), is the Chairman & Managing Director (CMD) of Mazagon Dock Shipbuilders Limited. The retired naval officer took over his current position on 30 December 2019.[12]

The Appointments Committee of Cabinet (ACC) has appointed Captain Jagmohan (Retd.) as the Chairman and Managing Director of Mazagon Dock Shipbuilders Limited. He will lead the company until his retirement on 30 September 2029. The former Navy captain is currently serving as the Director, Corporate Planning, Projects and Business Development at Goa Shipyard Limited.[13]

As of April 2025, Mazagon Dock Shipbuilders Limited is negotiating to acquire a majority stake of Colombo Dockyard PLC (CDPLC). MDL will reportedly purchase 51% stakes from Japan's Onomichi Dockyard Co. Ltd. after the continuous losses from CDPLC. A Memorandum of Understanding (MoU) is expected by the end of the month.[14]

The dockyard was originally established 1774 while it was acquired by the Government of India in 1960 and celebrated its 250th anniversary in 2025. As of then, the yard built 800 ships overall including 31 capital warships and eight submarines along with an export record of 214 vessels to international clients. The shipyard will also expected to play a major role in the Indian Navy's goal to reach a size of 175 Capital Ships with 100% indigenisation within 2047.[15]

## Activities

[edit]

The company's activities are shipbuilding, submarine building, and fabrication of offshore structures. It has manufacturing facilities on both the Mumbai peninsula and on the mainland.

The yard can build warships, submarines, and merchant ships up to 30,000 deadweight tons (DWT).[16] It can also fabricate wellhead platforms, process and production platforms, and jack-up rigs for oil exploration.

As of 2025, the shipyard has the capacity to handle 11 submarines and 10 warships at a time.[15]

Beside the existing facility, MDL developed a shipbuilding cum ship repair facility on 15 acres (61,000 m2) of land which is leased from Mumbai Port Authority for 29 years.[17] As reported on July 2025, shipbuilding operations have commenced in the facility,[15]

### Expansion

[edit]

The shipyard has expansion plans worth ₹4,000−5,000 crore (US$−590 million) to focus on securing and executing export orders. Of this, a major share of over ₹1,000 crore (US$120 million) is to be invested at its 40-acre-Nhava facility near Mumbai. This includes development of jetty and a facility for holding the vessel, dredging, and other associated works. MDL has awarded a contract worth ₹475 crore (US$56 million) to private-run Shoft Shipyard in Gujarat to erect a floating dry dock in the facility. Six blocks are to be built by Shoft, which will be transported to Nhava for erection. As of now, 4 blocks has been completed. The dock will have dimensions 180 m (590 ft) by 44 m (144 ft) by 19.5 m (64 ft) in length, breadth and height, respectively and will be able to handle eight 12,800 tonne-class ships simultaneously. The dock will be used for the construction and repair of larger commercial ships as well as for the Next Generation Destroyers.[17][18] As of July 2025, it is being reported that MDL will also reclaim 10 acres (40,000 m2) in its Mumbai facility to create two new basins for the simultaneous construction of larger ships and submarines. The overall expansion would double the shipyard's deadweight handling capacity from 40,000 tonnes to 80,000 tonnes. With the additional 37 acres (0.15 km2) of land acquired at Nhava Sheva port, MDL aims to achieve a deadweight handling capacity from 2 lakh tonnes. The Ministry of Defence ensured that this facility will ensure the timely construction as well as the repair and overhaul of warships.[19]

There are also plans to erect another graving dry dock of approximately 180 m (590 ft) by 60 m (200 ft) dimensions, and other ancillary facilities to double up shipbuilding and ship repairs capacity. Additionally, the new submarine orders could be executed in the existing facilities due to their inherently smaller dimensions.[17][18]

### Colombo Dockyard acquisition

[edit]

The Mazagon Dock Shipbuilders, in its regulatory filing on 27 June 2025, announced its decision of acquisition of a controlling (51%) stake in Sri Lankan peer Colombo Dockyard in a deal worth up to ₹450 crore (US$52.96 million) in order to grow its shipbuilding and repair business.The transaction will be completed within six months following which the Sri Lankan shipbuilder will become a part of Mazagon Dock Shipbuilders.[20] At the end of November 2024, Japan’s Onomichi Dockyard exited its majority stake in Colombo Dockyard. Following this, Colombo reportedly sought New Delhi’s assistance in encouraging Indian investment to avoid default. Mazagon Dock Shipbuilders Ltd was subsequently shortlisted due to its shipbuilding experience and financial capability.[21][22]

## Naval projects

[edit]

### Warships

[edit]

#### Nilgiri-class frigate (1972)

[edit]

The first warship built by MDL was the 2,900-ton displacement INS Nilgiri, the lead ship of her class. She was launched on 15 October 1966 and commissioned on 23 June 1972. Five more frigates of this class were built over the next nine years for the Indian Navy.[23]

#### Godavari-class frigate

[edit]

While construction of the Nilgiri class was being completed, the Indian Navy proposed requirements for an indigenously designed and built frigate. This new frigate was to be of wholly Indian design and manufacture. To address these requirements, MDL designed and built the Godavari-class guided-missile frigates with a 3,800-tonne displacement and the ability to embark two helicopters. MDL built three ships of the class – the lead ship, INS Godavari, INS Ganga, and INS Gomati.[24]

#### Khukri-class corvettes

[edit]

INS Kuthar

MDL designed and built the first two vessels of the Khukri-class corvettes for the Indian Navy. The lead vessel of the class was commissioned on 23 August 1989, and the second, INS Kuthar, on 7 June 1990. The remainder of the class was built at Garden Reach Shipbuilders and Engineers (GRSE) following a transfer of technology from MDL to diversify warship building capabilities to other yards, as well as to make room at MDL for larger projects.[25]

#### Delhi-class destroyers

[edit]

The next class of vessels designed and built by MDL was Project 15 Delhi-class guided-missile destroyers. These were powered by gas turbines and displaced 6,200 tonnes. The first of the class, INS Delhi, was launched in February 1991 and commissioned on 15 November 1997. The second, INS Mysore, was commissioned on 2 June 1999, followed by the last ship in the series, INS Mumbai, on 22 January 2001.[26]

#### Shivalik-class frigates

[edit]

INS Shivalik

The 6000-ton Shivalik-class (Project 17) frigates are the first warships with stealth features to be designed and built in India. These multi-role, guided-missile frigates have reduced radar signatures and have entered service from 2010 onwards. At least three of this class have been constructed at MDL. The lead vessel of the class was commissioned on 29 April 2010. The last ship of the class, INS Sahyadri, was launched on 27 May 2005 and commissioned on 21 July 2012.

#### Kolkata-class destroyers

[edit]

INS Kolkata

Kolkata-class vessels are the next-generation of guided-missile destroyers in the 7,400-tonne range to be designed and built at MDL. They incorporate stealth features. The lead vessel of the class was launched on 30 March 2006. At least three vessels of the class were planned. All three are in active service.

#### Visakhapatnam-class destroyers

[edit]

INS Visakhapatnam

Visakhapatnam-class vessels are the next-generation of guided-missile destroyers in the 7,500-tonne range to be designed and built at MDL. They incorporate stealth features and improved weapons and avionics compared to the Kolkata class. The lead vessel of the class was launched in 2018. At least four vessels of the class are planned.

#### Nilgiri-class frigates

[edit]

INS Nilgiri, INS Surat and INS Vagsheer during their commissioning at MDL

Nilgiri class vessels are the next-generation of guided-missile frigates in the 6,500-tonne range to be designed and built at MDL and GRSE. They incorporate stealth features. The lead vessel of the class was launched on 28 September 2019. Seven vessels of the class were built by MDL and GRSE. INS Mahendragiri, the seventh and final ship of the class was launched in Mumbai on 1 September 2023.[27]

#### Coast Guard vessels

[edit]

The yard builds offshore patrol vessels (OPVs) for the Indian Coast Guard. These vessels are specialised ships built for patrolling, policing, and search and rescue operations in India's exclusive economic zone. Each carries a helicopter on board. Seven such ships have been delivered.

#### Floating police stations

[edit]

Based on the order from the Border Security Force (BSF), the yard started construction of floating border outposts (BOPs). Essentially these BOPs are floating police stations with four high-speed boats. The yard has delivered 9 out of an order of 14 BOPs.

#### Other vessels

[edit]

Among other ships, the yard has built three fast missile boats, a cadet training ship, and other utility ships for the Indian Navy. It has also built Kangan class water tankers for the Iranian naval forces.[28]

### Submarines

[edit]

#### Shishumar-class submarine

[edit]

The Shishumar-class submarines are a variant of the Type 209 diesel-electric submarine designed by Howaldtswerke-Deutsche Werft. Two vessels of this class were constructed at MDL, which are the first indigenously built submarines in India. INS Shalki was commissioned on 7 February 1992 and INS Shankul was commissioned on 28 May 1994.

#### Kalvari-class submarine

[edit]

MDL has built six diesel-electric submarines of the Kalvari class under a technology-transfer agreement with Naval Group. INS Kalvari, the first in this class, was commissioned on 14 December 2017 from Naval Dockyard in Mumbai.[29]

### US Navy

[edit]

In September 2023, MDL became the second Indian shipyard after the Kattupalli Shipyard of Larsen & Toubro to sign a Master Ship Repair Agreement (MSRA) with the US Government, represented by NAVSUP Fleet Logistics Center (FLC) Yokosuka, for United States Navy's Military Sealift Command Fleet Support Ships.[30][31] The ships operated by MSC are non-commissioned US Navy “support vessels” with civilian crews bearing the prefix “USNS”. Under the agreement, the US Naval ships of the Central Command that are in voyage are to be repaired in India.[32][33][34]

### Upcoming projects

[edit]

#### P-75(I) submarine

[edit]

MDL's joint venture with ThyssenKrupp, a German conglomerate, is the sole contender for the Indian Navy's P-75(I) submarine program.[35] Commercial negotiations with the Ministry of Defence began in January 2025.[35]

## Commercial projects

[edit]

### Offshore platforms

[edit]

MDL builds offshore oil drilling platforms. It operates facilities at Alcock, Mumbai, and Nhava Yard for the construction of platforms with wellhead, water injection and production separator and glycol process capabilities, as well as jackup rigs, SBMs and other offshore structures.[36]

Repair and maintenance jobs on offshore rigs are undertaken at Alcock; jackets up to 80 metres (260 ft) length and 2,200-tonne weight can be constructed. At Nhava, jackets up to 80 metres (260 ft) length and 2,300-tonne weight, main decks up to 550-tonne weight, and helipads of 160-tonne weight can be constructed.

The yard builds specialist vessels able to clean oil spills and fight fires on offshore drilling platforms.

A welding training school develops and maintains welding techniques and procedures.

## See also

[edit]

* Cochin Shipyard
* Colombo Dockyard
* Garden Reach Shipbuilders and Engineers
* Goa Shipyard Limited
* Hindustan Shipyard

## References

[edit]

Wikimedia Commons has media related to Mazagon Dock Shipbuilders.

1. ^ a b c Introduction Archived 19 April 2016 at the Wayback Machine Mazagon Docks Ltd
2. ^ a b c https://mazagondock.in/images/pdf/mazdock-annual-report-agm-notice-2023-2024.pdf
3. ^ a b c d https://mazagondock.in/images/pdf/Investor Presentation_Q4 FY24-25 V6.pdf
4. ^ "Company Name Change of Mazagon Dock Shipbuilders Ltd". GoodReturns.in. Greynium Information Technologies Pvt. Ltd. Archived from the original on 8 March 2021. Retrieved 8 March 2021.
5. ^ "Mazagon". mazdock.com. Archived from the original on 20 July 2017. Retrieved 31 January 2018.
6. ^ "Mazagon Dock shares dive 13% as govt to exercises oversubscription option to sell additional 1.18% stake". The Economic Times. 7 April 2025. ISSN 0013-0389. Retrieved 20 April 2025.
7. ^ "Mazagon Dock Shares Sink 14% in 2 Sessions as Govt Upsizes OFS". Groww. Retrieved 20 April 2025.
8. ^ "Mazagon Dock Shipbuilders Limited" (PDF). HDFC Securities. Archived (PDF) from the original on 18 November 2022. Retrieved 18 November 2022.
9. ^ "Mazagon Dock Shipbuilders eyeing orders worth Rs 1.59 trillion from Indian Navy". Financial Express. Archived from the original on 18 November 2022. Retrieved 18 November 2022.
10. ^ "Mazagon Dock Shipbuilders hits new high on heavy volumes; up 27% in 2 days". Business Standard. Archived from the original on 18 November 2022. Retrieved 18 November 2022.
11. ^ "Mazagon Dock Shipbuilders becomes the 18th 'Navratna' company of India". CNBC TV18. TV18 Broadcast Limited. 16 June 2024. Retrieved 20 October 2024.
12. ^ "Mazagon". www.mazdock.com. Archived from the original on 16 October 2016. Retrieved 27 November 2017.
13. ^ PTI (18 April 2025). "Former Navy Captain Jagmohan appointed Mazagon Dock Shipbuilders Chairman and Managing Director". The Hindu. ISSN 0971-751X. Retrieved 23 April 2025.
14. ^ Narasimha, A. S. L. (22 April 2025). "Mazagon in negotiations to acquire controlling stake in CDPLC - Maritime Gateway". Maritime Gateway. Retrieved 23 April 2025.
15. ^ a b c "India pushes for bigger naval fleet with Rs 5,000-crore investment after Op Sindoor". India Today. 14 July 2025. Retrieved 15 July 2025.
16. ^ "Mazagon Dock Shipbuilders Limited – Ship Builder to the Nation". Archived from the original on 19 April 2016.
17. ^ a b c www.ETInfra.com. "Mazagon Dock to erect India's largest floating dry dock at Nhava near Mumbai to expand capacity - ET Infra". ETInfra.com. Retrieved 25 January 2025.
18. ^ a b "Mazagon Dock to build largest floating dry dock at Nhava Island". Maritime Gateway. 25 January 2025. Retrieved 25 January 2025.
19. ^ "India pushes for bigger naval fleet with Rs 5,000-crore investment after Op Sindoor". India Today. 14 July 2025. Retrieved 15 July 2025.
20. ^ "India's Mazagon Dock Shipbuilders to buy controlling stake in Colombo Shipyard". Reuters. 28 June 2025. Retrieved 29 June 2025.
21. ^ Srinivasan, Meera (28 June 2025). "Mazagon Dock Shipbuilders to buy controlling stake in Colombo Dockyard". The Hindu. ISSN 0971-751X. Retrieved 29 June 2025.
22. ^ Roy, Shubhajit (29 June 2025). "Behind Mazagon Dock's Lanka deal: Eye on China, Colombo bailout plea". The Indian Express. Archived from the original on 29 June 2025. Retrieved 29 June 2025.
23. ^ "F 33 Nilgiri Class". Global Security.org. Archived from the original on 15 December 2006. Retrieved 8 December 2006.
24. ^ "F 20 Godavari Class Frigate". Global Security.org. Archived from the original on 5 October 2013. Retrieved 8 December 2006.
25. ^ "P 49 Khukri Class". Global Security.org. Archived from the original on 30 September 2007. Retrieved 8 December 2006.
26. ^ "D Delhi Class Destroyer". Global Security.org. Archived from the original on 30 December 2013. Retrieved 8 December 2006.
27. ^ "'Testimony To India's Growing Maritime Prowess': Stealth Frigate Warship Mahendragiri Launched In Mumbai". www.india.com. Archived from the original on 1 September 2023. Retrieved 1 September 2023.
28. ^ Saunders, Stephen; Philpott, Tom, eds. (2015), "Iran", IHS Jane's Fighting Ships 2015–2016, Jane's Fighting Ships (116th Revised ed.), Coulsdon: IHS Jane's, p. 394, ISBN 9780710631435, OCLC 919022075
29. ^ "PM Narendra Modi dedicates scorpene-class submarine INS Kalvari to the nation". The Economic Times. 14 December 2017. Archived from the original on 14 December 2017. Retrieved 14 December 2017.
30. ^ Peri, Dinakar (8 April 2024). "Cochin Shipyard signs ship repair agreement with U.S. Navy". The Hindu. ISSN 0971-751X. Retrieved 27 September 2024.
31. ^ "Mazagon Dock shares in news on signing MSRA with US government. Key details". Business Today. 8 September 2023. Retrieved 27 September 2024.
32. ^ "Chennai's L&T shipyard to repair US Navy ships for five years". The Times of India. 10 July 2023. ISSN 0971-8257. Retrieved 27 September 2024.
33. ^ "ASSESSING INDIA-US "MASTER SHIP REPAIR AGREEMENTS" (MSRAs)". maritimeindia.org. Retrieved 27 September 2024.
34. ^ "Mazagon Dock Shipbuilders inks pact with US Navy to service its fleet - CNBC TV18". CNBCTV18. 7 September 2023. Retrieved 27 September 2024.
35. ^ a b Patel, Shivam (23 January 2025). "German-Indian JV emerges as sole contender for $5 billion India submarine deal". Reuters. Retrieved 22 May 2025.
36. ^ "Mazagon Dock Limited :: Heavy Engineering - Introdcution". Mazagon Dock Limited. Archived from the original on 4 November 2008.

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