Navigation authority is like having a boss for boats and ships. Just like a boss tells you what to do at work, navigation authority tells boats and ships where they can and can't go on the water.
Sometimes the water can be dangerous and the navigation authority helps keep everyone safe by making rules and guidelines that everyone has to follow. Think of it like a teacher who makes rules for the class to follow so that everyone can learn and have fun together.
The navigation authority might also help boats and ships navigate tricky areas like narrow channels or rocky shoals by providing maps and markers to help them stay on course. Just like a parent who helps you learn to ride your bike with training wheels and gives you directions to follow.
In summary, navigation authority helps keep everyone safe on the water by making rules and providing guidance, just like a boss, teacher, or parent helps you at work or at home.