The flag should be flown on the aircraft carrying the President, the Vice-President or the Prime Minister on a visit to a foreign country. Alongside the National Flag, the flag of the country visited should also be flown; however, when the aircraft lands in countries en route, the national flags of the respective countries would be flown instead. When carrying the president within India, aircraft display the flag on the side the president embarks or disembarks; the flag is similarly flown on trains, but only when the train is stationary or approaching a railway station.