♦ The Indian Navy commissioned two Nilgiri-class stealth guided-missile frigates, the INS Udaygiri and INS Himgiri, at Visakhapatnam on 26 August 2025.

♦ These are follow on ships of the Project 17 (Shivalik) class frigates.  

♦ Udaygiri, built by Mazagon Dock Shipbuilders Ltd. (MDL),  Mumbai, and Himgiri, constructed by Garden Reach Shipbuilders & Engineers (GRSE), Kolkata. 

♦ Udaygiri also holds the distinction of being the fastest ship of her class to be delivered post-launch, a result of the modular construction methodology adopted by Indian shipyards.

♦ Displacing about 6,700 tons, the P17A frigates are roughly 5% larger than their predecessor Shivalik-class frigates.

♦ The new frigates are sleeker with a reduced radar cross section and incorporate significant improvements in design, stealth, weapon and sensor systems.