WHAT DOES RED AND GREEN LIGHT INDICATE WHEN SEEN AT NIGHT ON BOAT?

Red and green lights on a boat indicate its direction and status at night. A vessel showing a red light on the left (port side) and a green light on the right (starboard side) is facing you, while if you see both lights, the boat is moving toward you. In navigational contexts, these lights help prevent collisions by indicating the boat's orientation and movement to other vessels.