The Kolkata-class (Project 15A) are a class of guided-missile destroyers constructed for the Indian Navy. The class comprises three ships - Kolkata, Kochi and Chennai, all of which are being built by Mazagon Dock Limited (MDL) in India, and are the largest destroyers to be operated by the Indian navy. Due to delays in their construction, and a problem found during the sea trials, the initial commissioning date of the first ship of the class has been pushed back from 2010 to 2014.