INS Sindhurakshak (S63) is a diesel-electric submarine

Submarine

A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

 of the Indian Navy

Indian Navy

The Indian Navy is the naval branch of the armed forces of India. The President of India serves as the Commander-in-Chief of the Navy. The Chief of Naval Staff , usually a four-star officer in the rank of Admiral, commands the Navy...

. On February 26, 2010, a sailor aboard the submarine was killed in a fire that broke out in the battery compartment of the submarine while it was docked at Visakhapatnam naval base, though the platform suffered no serious damage.

In August 2010, INS Sindhurakshak arrived at Zvezdochka shipyard in Russia, for an overhaul and upgrade.