A revetment is like a very strong and protective wall that airplanes can hide behind when they are not flying. It's like a big, sturdy fence that keeps the airplanes safe from any bad things that might come their way, like wind, rain, or even enemy attacks.
Think of it like your house. When you go inside your house, you are protected from the outside world. You can play, eat, and sleep without worrying about anything bad happening to you. That's what a revetment does for airplanes! It keeps them safe and protected.
The revetment is made from very strong materials, like concrete or steel. It's built in a way that makes it hard for anything to get through, like a big gate that is locked shut.
The airplanes can park inside the revetment, which is usually a small building with a roof and walls. This means that the airplanes are protected from things like weather, which can damage airplanes.
In summary, a revetment is like a big, sturdy wall that airplanes can hide behind to stay safe and protected. It's like a house for airplanes!