What is the purpose of navigation lights on an aircraft?

The purpose of navigation lights on an aircraft is primarily to assist in visual navigation during low visibility conditions. These lights are strategically placed on the aircraft to help pilots and air traffic control identify the aircraft's position, orientation, and direction of travel, especially at night or in poor visibility conditions. The red light typically indicates the left side of the aircraft, while the green light indicates the right side. Additionally, a white light is located at the tail. This color coding allows pilots to discern the aircraft's relative position and heading from various angles, which is crucial for separation and safety in the airspace.

While communication with other aircraft is important, navigation lights are not primarily used for that purpose; instead, visual signals or radio communication would serve that function better. The lights do not indicate readiness for takeoff nor are they designed for aesthetic appeal, even though they may contribute to the overall appearance of the aircraft. Their main role is in ensuring safety through visual awareness in the aviation environment.