Parkash commanded the Black Swan-class sloop INS Krisna, the Leopard-class frigate INS Betwa (1959), the Blackwood-class frigate INS Khukri (F149) and the Leander-class cruiser INS Delhi (C74). In 1965, he attended the Naval War College at Newport, Rhode Island in the United States.[1] He was promoted to the substantive rank of Captain on 30 June 1967.[10]