High Quality Content by WIKIPEDIA articles! The Kolkata class of guided-missile destroyers of the Indian Navy were conceptualized under Project 15A, and include land-attack capability as well as some signature reduction features. Three ships of the class are being built at Mazagon Dock Limited (MDL). The first vessel is expected to join the fleet in 2012. Four more ships are planned under Project 15B, and construction was approved by India`s Defence Acquisition Council in February 2009