Final answer:
A type rating must be held by the pilot in command for certain aircraft that require additional training beyond a basic pilot's license.
Step-by-step explanation:
In aviation, a type rating is a certification that allows a pilot to fly a specific type or model of aircraft that requires additional training beyond a basic pilot's license. The pilot in command (PIC) is the person who is ultimately responsible for the safe operation of an aircraft. In many aviation authorities, a type rating is required for the PIC when operating certain aircraft, typically those with a maximum takeoff weight above a certain threshold, such as 12,500 pounds or more.
For example, in the United States, an airline pilot must hold a type rating for each aircraft type they command. This means that if the pilot is the PIC of a Boeing 737, they must have a type rating for the Boeing 737. Without the type rating, the pilot is not authorized to serve as the PIC of that specific aircraft.
However, it's important to note that the specific requirements for type ratings can vary depending on the aviation authority and the country in which the aircraft is being operated. It's crucial for pilots to understand and adhere to the type rating regulations applicable to their specific jurisdiction.