Kalvari class of submarines and its strategic significance

Context

Indian Navy’s fifth Kalvari-class Diesel Electric attack submarine INS Vagir was launched at Mazgaon Dock.

Indian Naval Ship (INS) Vagir, is the fifth among the six Kalvari-class submarines. The other vessels in the class are INS Kalvari, INS Khanderi, INS Karanj, INS Vela and INS Vagsheer.
The Kalvari-class submarines have capability of operating in a wide range of Naval combat including anti-warship and anti-submarine operations, intelligence gathering and surveillance and naval mine laying.
It is stealthy class of submarines having been built under Project 75 and whose design is based on the Scorpene class of the submarines.
Kalvari and Khanderi have been commissioned in 2017 and 2019, Vela and Karanj and undergoing sea trials, Vagir has now been launched and Vagsheer is under construction.

The Indian Navy intends to acquire Six Diesel-Electric Submarines, to enable them to stay submerged for longer duration and substantially increase their operational range.
It is Kalvari class of submarines and INS Kalvari, INSKhanderi, INS Karanj, INS Vela, INS Vagirand INS Vagsheer will be designed under this project.
Under Project 75, Mazgaon dock ship buliders limited (MDL) will maufacture six Scorpene sub marine for Indian Navy.
The Technology Transfer will take place from Naval Group of France.

The Kalvari-class submarines have capability of operating in a wide range of Naval combat including anti-warship and anti-submarine operations, intelligence gathering and surveillance and naval mine laying.
These submarines are around 220 feet long and have a height of 40 feet. It can reach the highest speeds of 11 knots when surfaced and 20 knots when submerged.
The Kalvari class of submarines are capable of launching various types of torpedoes and missiles