INS Surat Launch: INS Surat is the fourth and the last ship of the 7,400-tonne Project 15B Indian Navy Destroyers, called the Visakhapatnam class after the lead vessel INS Visakhapatnam.
source https://www.jagranjosh.com/current-affairs/ins-surat-ins-udaygiri-know-5-key-facts-about-indian-navys-two-new-warships-1652778995-1