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There are usually three planes. Four helicopters. General regulations: the plane is equipped with a red light at the left wing tip, a green light at the right wing tip and a white light at the tail end; The helicopter fuselage is equipped with red light on the left side, green light on the right side, white light at the tail end and red light at the top of the rotor.

It must be connected in flight. Navigation lights are used to find and judge each other's sliding directions when sliding on the ground at night, and to judge the distance to prevent wing tip collision.

In order to increase visibility, some aircraft also install two sets of lights with the same color at the wing tip. During the flight, if the pilot sees that the navigation light in front of the plane is left red, right green and white, he will know that it is sailing forward with himself, and there will be no collision as long as a certain distance is kept.

If you see the left green, right red and white in the middle, you know that the plane is coming towards you, and you should take evasive measures immediately to avoid the collision between the two planes.

Extended data

In the history of world aviation, there have been hundreds of accidents in which two planes collided in the air, especially at night. This situation is more likely to happen if there is no corresponding indicator light on the plane. In order to avoid such accidents as much as possible, aviation engineers and technicians installed red, green and white navigation lights on the plane.

Usually, the navigation light source of aircraft must have the characteristics of strong penetration, high brightness and long service life, but ordinary tungsten lamp can't meet the above requirements.

As the fourth generation lighting technology, LED lighting takes semiconductor as light source, which has the characteristics of low driving voltage, high luminous efficiency, small volume, easy integration and long life. It is an inevitable trend for aircraft navigation lights to use LED lighting instead of incandescent lamps with high calorific value.

References:

Baidu encyclopedia-navigation light