The secret undersea weapon Sandeep Unnithan January 17, 2008 Located up the winding shipping channel in Visakhapatnam harbour is a secret, completely enclosed facility known only as the Shipbuilding Centre (SBC). Inside this dry dock, nearly 50m below ground level, is a cylindrical black shape, which is as tall as a two-storey building and at 104 m in length, is longer than the Qutub Minar lying on its side. Technicians working on it confess to a surge of national pride: India’s first nuclear-powered ballistic missile submarine or SSBN is arguably its greatest engineering project. For over a quarter of a...