India has made a major breakthrough in naval defence with the successful development of the Extended Range Anti-Submarine Rocket, or ERASR. This powerful new weapon, fully made in India, is designed to detect and destroy enemy submarines from a much longer distance than earlier systems.

ERASR acts like an 'underwater eye' for the Indian Navy, capable of keeping a close watch over vast ocean regions and responding quickly to hidden underwater threats. With enemy submarines becoming more advanced and harder to detect, this long-range rocket will give India a strong advantage in safeguarding its coastal areas and national interests in the Indian Ocean.

Enhanced range and advanced technology

Previously, the Indian Navy used anti-submarine rockets that could reach targets up to 5.3 kilometres away. While that was helpful for close combat, it gave little time to react if a submarine was detected farther off.

The ERASR has now increased that strike range to around 8.5 kilometres -- nearly 60 percent more. That means the Navy can detect and destroy a threat much earlier and from a safer distance.

The rocket also brings important improvements in technology. Unlike the older systems, which used a single-stage motor, ERASR comes with a two-stage solid propulsion system that allows it to cover both short and long distances effectively.

ERASR also features a special Electronic Time Fuse developed in India. This fuse ensures that the rocket explodes at exactly the right time, close to the enemy submarine, increasing its chances of destroying the target.

Successful trials and seamless integration

Between June 23 and July 7, 2025, the Indian Navy carried out a series of user trials for the ERASR system from its advanced warship, INS Kavaratti. A total of 17 rockets were test-fired in real sea conditions, and each one performed successfully. These trials checked whether the rocket could reach its maximum distance, whether the electronic fuse worked correctly, and whether the warhead could hit its target with accuracy.

The results confirmed that ERASR is ready to be inducted into regular Navy use. This information was officially released by the Press Information Bureau on the evening of July 8, 2025, marking it as a key moment in India’s journey towards self-reliance in defence technology.

The rocket has been developed by the Armament Research and Development Establishment (ARDE) in Pune, a key lab under the Defence Research and Development Organisation (DRDO). It was supported by the High Energy Materials Research Laboratory and the Naval Science and Technological Laboratory, which provided additional technical expertise.

One of the biggest advantages of ERASR is that it is designed to work with the Indigenous Rocket Launcher (IRL) system already fitted on Indian Navy ships. This means that the Navy does not need to buy expensive new systems or make large changes to its warships. The rocket fits in smoothly with the current setup, making the upgrade quick and cost-effective.

'Make in India' boost and strategic importance

The production of ERASR will also take place entirely in India, adding further strength to the government's 'Make in India' programme. Two Indian companies, Bharat Dynamics Limited in Hyderabad and Solar Defence and Aerospace Limited in Nagpur, have been selected as production partners. This move not only reduces India's dependence on foreign defence equipment but also creates jobs and supports local industries. The project shows how India can develop and produce modern weapons using its own resources and talent.

The Indian Ocean region is becoming increasingly crowded with submarines from various countries, and protecting India's 7,500-kilometre-long coastline and maritime trade routes is more important than ever. The ERASR gives the Navy the tools it needs to take early action against underwater threats and maintain control over critical sea lanes.

It is a timely and essential addition to India's defence arsenal. More than just a weapon, ERASR is a shining example of what Indian scientists, engineers, and industries can achieve when working together. It represents India's growing confidence in building high-end military technology and shows the world that India is ready to protect its interests with strength and self-reliance.

The author is a defence, aerospace & geopolitical analyst