Vietnam Helicopters (VNH), formally the Vietnam Helicopter Corporation (VNH Corp or VHC; Vietnamese: Tổng công ty Trực thăng Việt Nam - Công ty TNHH, lit. 'Vietnam Helicopter Corporation - LLC'), also known by its military designation Corps 18 (Vietnamese: Binh đoàn 18), is a transportation business owned by the Vietnam Ministry of National Defense. It operates helicopters to transport cargo, train pilots and export/import devices in the aviation industry as well as providing aircraft maintenance while offering commercial services such as tourist transportation. Being a state-owned enterprise and a formally a combat unit under the People's Army of Vietnam, VNH also operates government-sponsored flights serving civil defense purposes including medical evacuation as well as search and rescue missions.