Navigation Lights

Navigation lights are essential signals used on ships, boats and aircraft to indicate position, heading, and status at night or in low visibility.
Their standardized colors - red (port), green (starboard), and white (stern/mast) - help prevent collisions and ensure safe passage.

Sailor’s note: The system is so universal that even astronauts use navigation lights - spacecraft like the International Space Station are equipped with red and green lights, just like ships at sea!