What type of notification is issued when flight in NSAs is temporarily prohibited?

A NOTAM, or Notice to Airmen, is a crucial tool used to inform pilots and aviation personnel about conditions affecting the safe operation of flights, especially in the context of temporary restrictions. When flight within National Security Areas (NSAs) is temporarily prohibited, a NOTAM is issued to provide timely and essential information regarding the restricted airspace. This ensures that all relevant parties are aware of the change in flight operations and can adjust their plans accordingly to maintain safety and compliance with airspace regulations.

Flight Advisories, while useful for providing alerts or advisories about changing conditions in the airspace, do not specifically formalize the prohibition of flights. Air Traffic Notices typically communicate more general information or operational changes without the specific legal enforcement of a temporary prohibition. Security Bulletins, while addressing security-related concerns, do not serve the same purpose as a NOTAM in terms of flight operations and airspace restrictions. Thus, the NOTAM is the recognized and proper notification for these circumstances.