Which of the following best describes the purpose of the (A)* notation in airport information?

The purpose of the (A)* notation in airport information is to denote partial service hours. This notation provides critical information for pilots and air traffic personnel regarding when specific services at the airport are available. Understanding this helps ensure that flight operations are planned considering the times when services, such as fuel or maintenance, may not be accessible. The clarity provided by this notation is vital for effective communication and safe airport operations. Other notations in airport information serve different purposes, such as signifying upgraded facilities or continuous notifications, but the (A)* specifically indicates that services are available only during certain hours, which is crucial for operational planning and safety.