A Chetak from INAS 321 "Angels" trailing the naval ensign at dusk off Ramakrishna Beach. Alouette IIIs were ordered by the Indian Navy in 1962 but were requisitioned by the IAF during the Sino-Indian War. The Navy received its Alouette IIIs in 1964 and these formed a flight aboard INS Vikrant. Later, INAS 321 "Angels" was formed in 1969 and its Chetaks have been detached for SAR and liaison duties to ships and stations as required. A Chetak flight also served in Antarctica.