What does NOTAM stand for?

NOTAM stands for "Notice to Airmen." This term identifies a system that provides essential information about the status of various aspects of aviation that may affect flight operations. This information includes details regarding runway conditions, navigational aids, airspace restrictions, and other hazards that pilots and air traffic controllers need to be aware of. By communicating critical information promptly, NOTAMs help ensure safety and operational efficiency in the airspace.

The other options presented do not accurately reflect the meaning of NOTAM. National Operations Training and Management, Notice of Temporary Airspace Modification, and National Transport Authorization Management do not correspond with the widely recognized definition and function of NOTAM in the aviation community. The official use of the term is rooted in addressing the safety of aviation operations, making "Notice to Airmen" the thoroughly established and correct answer.