Indian Navy's third Scorpene class submarine commissioned SECTIONS Last Updated: Mar 11, 2021, 03:44 PM IST Share Synopsis INS Karanj is the third Kalavari-class submarine to be commissioned into the Navy. The diesel-electric submarines based on the Scorpene design are also referred as Scorpene class submarines. Scorpene class Submarine INS Karanj Related Indian Navy's third stealth Scorpene class Submarine INS Karanj, equipped with potent weapons and sensors to neutralise any threat above or below the sea surface, was commissioned here on Wednesday. Former Navy chief Admiral V S Shekhawat, who was part of the commissioning crew of the old Karanj and later the Commanding officer during the 1971 IndoPak war, was the chief guest for the commissioning ceremony at the Naval Dockyard.