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Former DRDO director general, VS Arunachalam, passed away in the US on Wednesday at the age of 87. His family confirmed his demise in a statement.

Nuclear submarine, submarine that relies on a nuclear reactor to drive its propulsion system. A nuclear submarine may or may not be armed with nuclear weapons. The chief advantages afforded by nuclear power are increased speed (allowing submerged submarines to keep up with fast surface ships) and operational radius (a nuclear submarine can patrol while submerged for weeks rather than hours). Strategic nuclear submarines formed one of the pillars of the nuclear triad that defined Cold War nuclear strategy. In 1954, with the commissioning of USS Nautilus, nuclear power became available...

India’s quest for SSNs to ensure true deterrence against China will only be fulfilled with external assistance.

All operational and technological parameters of the weapon system have been validated, informed the Defence Ministry.

India test-fired a submarine-launched ballistic missile from INS Arihant. The missile was tested to a predetermined range and landed with pinpoint accuracy in the target area in the Bay of Bengal.