The Army Aviation Corps is the main body of the Indian Army for tactical air transport, reconnaissance, and medical evacuation, while the Indian Air Force's helicopter assets are responsible for assisting army troop transport and close air support. The Aviation Corps operates approximately 150 helicopters. The Indian army had projected a requirement for a helicopter that can carry loads of up to to heights of on the Siachen Glacier in Jammu and Kashmir. Flying at these heights poses unique challenges due to the rarefied atmosphere. The Indian Army will induct the HAL Light Utility Helicopter to replace its ageing fleet of Chetaks and Cheetahs, some of which were deployed more than three decades ago.