Hey as The Visakhapatnam class (Project 15B) is a class of stealth guided missile destroyers currently being built for the Indian Navy.

About Project 15b
The Visakhapatnam class will be armed with a 127 mm main gun
The sonar of the Visakhapatnam class will be bow mounted and will feature a revised bridge layout
The design of the mast, which features the main radar has been revised.
The Visakhapatnam class will have a full-fledged Total Atmosphere Control System (TAC) to provide its crew greater protection in a nuclear, chemical or biological warfare scenario.
The new Visakhapatnam class also features a rail-less helicopter traversing system to secure the helicopter they carry in heavy sea conditions.
Central to the Visakhapatnam class is a network-centric layout.
They are equipped with a Ship Data Network (SDN), an Automatic Power Management System and a Combat Management System. Essentially, all information critical for the operation of the warships during all operations is available to key officers through the SDN which the Navy describes as a data information highway
The Project 15B Visakhapatnam-class destroyers maintain the same hull and propulsion package as the Project 15A Kolkata class.
But Russia firm Northern Design Bureau, has been enlisted as design consultant to reduce the size of design's superstructure

Cost
The total cost of the project is expected to be ₹30,000 crore (US$4 billion).
Build-time for Project 15B is expected to be shorter than the Kolkata class, as no major re-designing was to be done and would require only the time of ship building.
Due to this, each warship is expected to save US$1 billion in costs.
The design was finalized and the first destroyer, INS Visakhapatnam was launched on 20 April 2015 and is expected to join the Indian Navy by 2018, with the follow on ships being delivered biennially