Navigation Lights Information
Navigation lights are colored illumination devices used on aircraft, watercraft, and spacecraft. They are used to alert other crafts or vessels of the signaling craft's position, status, and/or heading. Most aircraft and marine vessels are required by governing bodies to carry right-of-way lights, which are nav light system consisting of a red light on the left (port) side of the vessel and a green light on the right (starboard). By interpreting this system a nearby vessel can determine the craft's direction and right-of-way. Other specialized nav lights include strobes; typically fitted to aircraft, they emit a burst of high intensity light to enable signaling in low-visibility conditions.
Typical nav light designs (left) and some common marine nav light configurations.
Image credit: West Marine | Phuket Sail