A copilot is a person who helps the main pilot fly a plane.
A copilot is important for safety and helps the main pilot.
Examples:
The copilot helps the pilot fly the plane.
The copilot sits next to the pilot.
The copilot is trained to help the pilot.
The copilot and the pilot are like a team.
The copilot makes sure the plane is safe with the pilot.
The copilot is like the pilot's helper.