An Alpha Defense Exclusive

DRDO has been testing the submarine-launched variant of the Varunastra torpedo using a swim out tube. The laboratory has initiated the process of testing this torpedo in a simulated environment before firing it from a submarine of the Indian Navy. The swim out tube is 8 meters long and is designed to exactly fit the 7.8 meters long Varunastra. The tube mechanism includes lowering the tube into the water and then launching the torpedo as if it was launched from a submarine. The test structure also has recovery mechanism with winches, HD camera to record the launch for analysis, and other electrical setups required in an actual submarine torpedo launch system.

The Varunastra torpedo is an advanced heavyweight anti-submarine weapon developed by the Naval Science and Technological Laboratory (NSTL) of the Defence Research and Development Organisation (DRDO) for the Indian Navy. It is named after a legendary weapon created by the Hindu god of the oceans, Varuna.

Powered by an electric propulsion system with multiple 250 KW silver oxide zinc (AgOZn) batteries, the Varunastra can achieve speeds in excess of 40 knots (74 km/h; 46 mph) and has a range of 40 km (25 mi). Weighing around 1.5 tonnes, it can carry a 250 kg (550 lb) high-explosive warhead and has a maximum operating depth of 600 metres (2,000 ft). The torpedo’s guidance system uses active-passive acoustic homing, wire guidance, and GPS/NavIC satellite guidance.

Silver oxide zinc (AgOZn) batteries, also known as silver-zinc (AgZn) batteries, have several advantages over other types of batteries.

Firstly, they have a very high energy-to-weight ratio, which means they can store a lot of energy in a relatively small package. This makes them ideal for use in applications where weight is a critical factor, such as in torpedoes or other military equipment.

Secondly, AgOZn batteries are very reliable and have a long service life. They have a low self-discharge rate, which means they can retain their charge for a long time without needing to be recharged. They are also resistant to overcharging, which can be a problem with other types of batteries.

Finally, AgOZn batteries are considered to be safer and more environmentally friendly than other battery chemistries. They do not contain toxic heavy metals like lead or cadmium, and they can be recycled more easily than other battery types.

Compared to other torpedoes, the Varunastra has several unique features. It has conformal array transducers that allow it to look at wider angles than most common torpedoes. It also has an advanced autonomous guidance algorithm with low drift navigational aids, an insensitive warhead that can operate in various combat scenarios, and a GPS-based locating aid. The Varunastra has over 95% indigenous content, making it a key element in India’s push for self-reliance in defense technology.

In terms of specifications, the Varunastra has a length of 7.78 meters (25.5 feet) and a diameter of 533.4 mm (21.00 in). It is capable of being launched from surface ships and submarines. All future anti-submarine warfare ships in the Indian Navy will be capable of firing the Varunastra. The torpedo has already been ordered by the Navy in two batches and has also been exported to Vietnam and another country.

In conclusion, the Varunastra torpedo is a significant achievement for India’s defense industry and represents the country’s push for self-reliance in defense technology. With its advanced features and capabilities, and now this submarine launched variant will further improve it.

By Alpha Defense

Alpha Defense initially a solo venture but now a defense group by people from various demographics of India covering defense news and updates. We believe in unbiased analysis of every subject in hand. Our mission is to provide simplfiied defense information to the public.

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