Okay kiddo, so let's say you want to talk to your friend who is far away from you. You need to use a phone to call him, right? But if you don't know his phone number, you can't call him.
The same thing happens with airplanes. Airplanes have a special type of phone called a radio that they use to talk to other planes and people on the ground. They also use a special channel, like a phone number, to talk to each other.
This special channel is called the common pilot channel. It's a way for pilots to talk to each other when they are flying in the same area. It's like a big group chat for airplanes!
The common pilot channel helps pilots share important information, like what altitude they are flying at, which way they are going, and where they are going to land. This way, they can avoid crashing into each other and keep everyone safe.
So, the common pilot channel is a way for pilots to "talk" to each other while they are flying to make sure they all stay safe in the sky!