INS Kursura (S20) was a Kalvari-class (variant of the Foxtrot-class) diesel-electric submarine of the Indian Navy. She was India's fourth submarine. Kursura was commissioned on 18 December 1969 and was decommissioned on 27 February 2001 after 31 years of service. She participated in the Indo-Pakistani War of 1971, where she played a key role in patrol missions. She later participated in naval exercises with other nations and made many goodwill visits to other countries. After decommissioning, It was dedicated to the Nation by the Chief minister N. Chandrababu Naidu on 9 August 2002 and was preserved as a museum for public access from 24 August 2002 making its final journey to Visakhapatnam on RK Beach. Kursura has the distinction of being one of the very few submarine museums to retain originality and has been called a "must-visit destination" of Visakhapatnam. Despite being a decommissioned submarine, she still receives the navy's "Dressing Ship" honour, which is usually awarded only to active ships. From Wikipedia
