Which entity primarily issues NOTAMs?

Answer: C — Aeronautical information services

The issuance of NOTAMs, or Notices to Airmen, is primarily the responsibility of aeronautical information services. These services are established to ensure that crucial information affecting the safety of flight operations is communicated to pilots and aircrews in a timely and effective manner. NOTAMs can alert pilots to various important details, such as temporary flight restrictions, changes in airport facilities, navigation aids being out of service, and other significant information that could impact flight planning and safety. Aeronautical information services are equipped with the necessary resources and processes to gather, validate, and disseminate NOTAMs, ensuring that the information provided is accurate and relevant. In contrast, air traffic managers focus on managing air traffic flow and ensuring safety within controlled airspace but do not typically generate NOTAMs. Pilots in command may have the authority to communicate important information, but they do not issue NOTAMs as part of their routine roles. Airport operations teams deal with day-to-day operations at their respective airports but also do not have the formal responsibility to disseminate NOTAMs by themselves.