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Accessing essential information from the ATIS (Automatic Terminal Information Service) is primarily done through radio frequencies and phone numbers. The ATIS broadcasts continuous loops of recorded information concerning airport weather, runways in use, available approaches, and any pertinent notices to airmen. This information is critical for pilots and ground personnel operating in and around the airport.

Utilizing specific radio frequencies designated for ATIS allows airport personnel to listen to the latest information in real-time. Additionally, there may be phone numbers for those who need to receive information in a different format or when on the go, ensuring they can stay updated regardless of their location within the airport. This method of accessing ATIS information ensures that airport operations maintain safety and efficiency through up-to-date communications.

Other options like contacting customer service, checking terminal bulletin boards, or communicating directly with security staff do not provide the most accurate or timely access to the essential information that ATIS offers.