New Delhi: An Indian Army aviation unit, comprising six light helicopters and 70 personnel, will leave Wednesday for a United Nations peacekeeping mission in the Congoâ€™s restive Kivu province. Ahead of their departure, the team was flagged off here Tuesday. The contingent, led by Col. ShantanuKashyap, will stay in the Congo for one year. The Indian Army aviation contingent, with its Chetak and Cheetah helicopters, will provide air support to the UN peacekeepers, including border and field surveillance, observation and reconnaissance, medical transport and search and rescue flights. The UN mission in the Democratic Republic of Congo came into effect on Sep 3, 1999.