Imagine you're playing hide and seek in the dark with your friends. You need to use a flashlight to find your way around the dark room, and your friends need to see your flashlight so they know where you are too. That's kind of like how boats in the dark use navigation lights to help them find their way around and let other boats know where they are.
Navigation lights are special lights that boats use to help them see where they're going when it's dark outside. They're like big flashlight bulbs that are attached to the boat in specific places, usually on the front, back, and sides. Each light has a specific color and position so that other boats can know which direction the boat is headed and avoid running into it.
The front light on a boat is usually white and shines forward. This helps the captain see where they're going and helps other boats coming towards them know which direction they're going. The back light is usually red, so boats coming up behind the boat can see it and know how the boat is moving. And the side lights are usually green and red, so other boats can tell if the boat is turning and in which direction.
So, just like how you use a flashlight to find your way around in the dark during hide and seek, boats use navigation lights to help them see and avoid running into each other in the dark.