However, an aircraft in flight is impossible to stop. Steady Red – Red light signals always indicate a stop command. The aircraft do not have a clearance to land, so the aircraft must return for landing via Go-Around. This means the aircraft is cleared to land.įlashing Green – The flashing green light signal to an aircraft in flight means the aircraft should return for landing and is essentially a Go-Around command. Steady Green – Green signal lights always indicate a GO. The air traffic controller wants the pilot to return to the airport parking apron.Īlternating Red/Green – In countries such as the United States, the alternating red/green signal light means an important warning to the aircraft pilot to exercise extreme caution. The air traffic controller wants the aircraft pilot to find the nearest taxiway and get off the runway to allow other aircraft to use the runway.įlashing White – The flashing white signal means the aircraft pilot must return to their starting point. Steady Red – The steady red light means the aircraft must stop immediately and hold their position.įlashing Red –The flashing red light means the aircraft must taxi clear of the runway in use or get off the runway. Steady Green Light – The steady green light signal on the ground means the aircraft is cleared for takeoff and the pilot may proceed for takeoff.įlashing Green – The flashing green light signal on the ground means that the aircraft is cleared or authorized to taxi. As mentioned above, each of these colours have a specific meaning and vary depending whether the aircraft is in flight or on the ground. However, instead of red, green and amber, used by road traffic signals, the Air Traffic Control light signals use the colours red, green and white. Just like a traffic light, aviation light signals use three different colours. Aircraft pilots can acknowledge these instructions by rocking the aircraft wings, moving the ailerons, or by flashing their navigation lights.Īviation Light Signal Colours and their meanings The aircraft pilot must recognize both the colour and pattern (steady or flashing) to properly decode the message from the control tower. Each of these colours and patterns are instructions for aircraft pilots and have a specific meaning, depending whether the aircraft is in flight or on the ground. Signal lamps have focused bright beams that can generate red, white and green lights which can be steady or flashing. In case of communication failure or when an aircraft isn’t equipped with a radio, light signals are used using a signal lamp. Aviation lighting is essential in keeping everyone safe it ensures that building and objects can be seen in low light as well as helping both the pilot and air traffic controller communicate on landing in the form of light signals.
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