"Four ships of this class are under construction at GRSE, Kolkata. The first ship is expected to be commissioned by mid-2012 and will be closely followed by the other three ships with the last expected to be commissioned by early 2015," a naval official said. The corvette, a small fast-moving ship, was ordered in 2003 and the production is delayed by two years. The official said the 3,100-tonnage ship would be fitted with the latest indigenously developed sonars to detect submarines. "The torpedo tubes, and scutter (torpedo decoys) launchers contribute to its anti-submarine punch. In addition, the ship will also...