India has finalised a $2.1 billion (Rs 1,900 crore) deal with Italy to acquire 48 advanced heavyweight torpedoes for its Calvari-class submarines. It would boost their strike power and enhancing the Navy’s ability to tackle modern underwater threats. India has finalised a $2.1 billion (Rs 1,900 crore) deal with Italy to acquire 48 advanced heavyweight torpedoes for its Calvari-class submarines. It would boost their strike power and enhancing the Navy’s ability to tackle modern underwater threats.