Air India One (also referred to as AI-1 or AIC001) is the call sign of any Air India aircraft carrying the Prime Minister of India, President of India or the Vice President of India. Air India is the national airline of India. The aircraft are operated as VIP flights by the Indian Air Force (IAF). The IAF's Air Headquarters Communications Squadron, based at Indira Gandhi International Airport (formerly Palam Air Force Base) in New Delhi, is in charge of operating these aircraft.