What information should be included in the first contact with ATC where ATIS is available?

In the first contact with Air Traffic Control (ATC) where Automatic Terminal Information Service (ATIS) is available, including the ATIS phonetic identifier is essential. This identifier is a specific code that indicates the pilot has received and understood the latest ATIS broadcast, which provides critical information such as weather, runway in use, and any noteworthy updates regarding airport operations. By communicating the ATIS identifier, the pilot confirms that they are equipped with the most current information, facilitating a smoother and more efficient exchange with ATC.

The other options, while they contain relevant information for flight operations, do not specifically pertain to the essential first contact protocol with ATC in the context of using ATIS. Aircraft weight and altitude are important for operational calculations but not critical in the initial contact. Similarly, the intended route, departure time, pilot experience, and estimated arrival time can be addressed in subsequent communications after confirming ATIS information. Therefore, the ATIS phonetic identifier stands out as the key component of the initial transmission to ATC when ATIS is available.