Navigation Light

A navigation light is a colored source of illumination on a waterborne vessel or aircraft, used to signal a craft's position, heading, and status. Commonly, their placement is mandated by international conventions or civil authorities.

Navigation lighting systems include:

• Right-of-way lights - A red light will be mounted on the left or port side of the craft and a green on the right or starboard side. In a situation where the paths of two watercraft or aircraft cross, these lights help each crew determine the other craft's direction and who has right-of-way. When two craft have crossing paths, each sees a red or green running light. The one on the port side of the other, which must yield right of way, sees red, while the one on the starboard side of the other, which has right of way, sees green.

• Strobe lights - On aircraft primarily, strobe lights flash a high-intensity burst of white light, to help other pilots recognize the aircraft's position in low-visibility conditions.