Navantia and Larsen & Toubro Collaborate for India’s Project-75(I) Submarine Program

Navantia, a renowned Spanish shipbuilding company, and Larsen & Toubro (L&T), an Indian engineering conglomerate, have joined forces to participate in the prestigious Project-75 (India) submarine program of the Indian Navy. The Teaming Agreement was signed on July 10 at the Spanish Embassy in New Delhi, marking a significant development in defense cooperation between India and Spain. The purpose of this collaboration is to jointly submit a techno-commercial bid for the construction of six conventional submarines with Air-Independent Propulsion, making it the largest defense acquisition project in India.

The signing of the Agreement

The agreement signing ceremony took place in the presence of N. Subhramanyam, the Managing Director and CEO of L&T, and Augustin Alvarez Blanco, Vice President of Naval Construction and Member of the Board at Navantia. This agreement highlights the commitment of both companies to strengthen bilateral ties and contribute to the Indian Navy’s submarine program.

Navantia’s Role

Navantia, known for its shipbuilding expertise, will take charge of designing the P75(I) submarines based on its successful S80 class of submarines. The S80 class submarines have already demonstrated their capabilities, with the first vessel launched in 2021 and currently undergoing sea trials before its delivery to the Spanish Navy by the end of 2023. Navantia has a proven track record in submarine construction, having collaborated with DCNS of France in the design and construction of the Scorpene class submarines, which were successfully exported to Chile and Malaysia. Additionally, Navantia has played a crucial role in supporting the construction of Scorpene submarines in India, providing invaluable guidance and expertise to Indian shipyards.

About Project-75(I)

Project-75(I) is a significant military acquisition initiative led by India’s Ministry of Defense. The project aims to procure diesel-electric submarines for the Indian Navy and simultaneously foster the growth of indigenous capabilities in the private sector. By involving private companies like L&T, Project-75(I) seeks to enhance the design, development, and construction expertise within India to meet the future requirements of the Indian Armed Forces. This project not only strengthens India’s defense capabilities but also stimulates the industrial and manufacturing sectors, particularly the small and medium-sized enterprises involved in producing submarine-related equipment and spares.


The collaboration between Navantia and Larsen & Toubro for India’s Project-75(I) submarine program is a significant milestone in defense cooperation between India and Spain. Through this partnership, the two companies aim to deliver technologically advanced submarines to the Indian Navy. Successful execution of Project-75(I) will not only enhance India’s defense capabilities but also boost the country’s indigenous manufacturing capabilities, contributing to the growth of the defense industry.

India’s Project-75(I) Submarine Program – FAQs

Q1: What is the collaboration between Navantia and Larsen & Toubro (L&T) for Project-75(I) submarine program?

Ans: Spanish shipbuilder Navantia and Indian engineering giant L&T have joined forces to take part in India’s Project-75(I) submarine program. In order to build six conventional submarines with air-independent propulsion, the cooperation intends to jointly submit a techno-commercial bid.

Q2: What is Navantia’s role in Project-75(I)?

Ans: The submarines will be designed by Navantia based on its popular S80 class. They have a wealth of experience building submarines, having worked with the French DCNS company to design and build the Scorpene class of submarines. In order to help the creation and execution of Project-75(I), Navantia will contribute its expertise.

Q3: What is the objective of Project-75(I)?

Ans: The Indian Ministry of Defence has launched Project-75(I) to buy diesel-electric submarines for the Indian Navy. It intends to improve indigenous private sector capabilities in sophisticated weapon system design, development, and construction to satisfy future requirements of the Indian Armed Forces.


  • Pritipalit

    Priti Palit, an accomplished edtech writer, boasts a wealth of experience in preparing candidates for multiple government exams. With a passion for education and a keen eye for detail, she has contributed significantly to the field of online learning. Priti's expertise and dedication continue to empower aspiring individuals in their pursuit of success in government examinations.

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