They help you figure out which side of the plane is which in the dark. The green lights go on the right, or starboard, side; the red ones are on the left, or port, side.
Red
The rescue squad has red and green lights on their trucks.
Red buoys have even numbers and red lights; green buoys have odd numbers and green lights.
trafic lights where the amber light isn't working
airplane
by looking at it and using your jugment. or if u can see its navigation lights the red will be on the left and green on the right if it is going away from u
3 - green, yellow, red
The lights are still in this order: RED YELLOW GREEN
Use green lights for WHAT?
red,green, and blue
green, red, white
No they dont.