Indigenously developed heavyweight torpedo Varunastra was inducted in the Indian Navy on 29 June 2016. It was handed to the Indian Navy by Defence Minister Manohar Parrikar.With this India joined a select group of eight countries having the capability to design and develop heavyweight torpedoes.
•    The torpedo was designed and developed by Naval Science and Technological Laboratory of the DRDO for the Indian Navy. It carries 95 percent of indigenous content.
•    It weighs around 1.25 tonnes and is capable of carrying about 250 kg of explosives at a speed of around 40 nautical miles an hour.
•    Varunastra, a versatile naval weapon can be fired from the Rajput class destroyers, Delhi class and all future Anti-Submarine Warfare (ASW) ships capable of firing heavy weight torpedoes.
•    It is capable of targeting quiet and stealthy submarines both in deep and littoral waters even in intense countermeasure atmosphere.
•    Torpedo is a self-propelled weapon with an explosive warhead.
•    It can be launched above or below the water surface, propelled underwater towards a target.
•    It is designed to detonate either on contact with its target or in proximity to it.
•    The term torpedo was originally employed for a variety of devices, most of which would today be called mines.
•    From about 1900, torpedo has been used strictly to designate an underwater self-propelled weapon.
•    The original torpedo is a kind of fish: an electric ray.Earlier, Torpedo Varunastra was showcased for the first time on the 2016 Republic Day Parade at Rajpath.