What is the purpose of a NOTAM?

The purpose of a NOTAM, or Notice to Airmen, is primarily to provide essential information about flight safety. NOTAMs are critical communications that notify pilots of important changes or hazards that could affect flight operations. This information may include data on runway closures, airspace restrictions, navigational aids that are out of service, or potential hazards to flight that have not been publicly disseminated yet.

While the other options deal with important aspects of aviation, they are more specific and do not encompass the broader purpose of NOTAMs, which is fundamentally centered on ensuring safe and effective flight operations by relaying timely and relevant operational changes or hazards.