The under-construction nuclear submarine was a follow-up of the Navy's warship INS Arihant.
Under the Arihant class submarine development programme, India is building around three submarines which have not yet been named so far.
The first vessel of the class INS Arihant is expected to be launched for sea trials within a month or two and these are expected to be completed within this year.
Recently, Navy officials had said that after the trials of INS Arihant are completed, it would be ready for induction into operational service.
The ATV project is directly under the DRDO and the Navy plays a significant role in it.
