Ever seen red and green lights on a helicopter? Learn what they mean and how they help pilots navigate safely in the sky.

In addition, planes employ several kinds of small, colored lights on their bodies, particularly red and green lights on the tips of the wings. These look neat flying through the night, but they're ...

red and green colored lights like the ones found on boats. Many will also have flashing white strobe lights at their wingtips. And they have bright landing lights. Drones flying at night are only ...

DJI’s Spark drone is an exquisitely-built ... using my fingers to make a rectangle. The green lights flashed red for a few seconds as it counted down to my selfie. Each time I did this, I ...

As Ndayishimiye tells her story from a tiny hamlet in Gitamara district, a distant whine announces the passage of a drone before the flashing green and red lights on its wingtips pass into view.