ELI5: Explain Like I'm 5

Diver down flag

The diver down flag is like a warning sign that people use when someone is swimming or diving in the water. It looks like a red background with a white stripe running horizontally from one end to the other. This flag is usually hung on a pole or a buoy in the water.

When someone puts up the diver down flag, it means that there is someone in the water who is diving or swimming. It's important for people on boats or jet skis to be careful and avoid getting too close to the person in the water who may be diving because their bubbles may not be easily visible.

Think of it like a stop sign. When you see the red and white flag, it means that you should be careful and avoid going too fast near that spot because there may be someone underwater who you cannot see easily.

So, always remember when you see the diver down flag, slow down and be careful.