What does the acronym "NOTAM" stand for in air law?

The acronym "NOTAM" stands for "Notice to Airmen." This term is used in aviation to refer to information that is essential for the safe operation of aircraft. NOTAMs provide pilots and ground personnel with timely information regarding various factors that may affect flight safety. These can include details about hazards, runway closures, navigation aids, and more.

The significance of NOTAMs lies in their role in promoting aviation safety by ensuring that all parties involved in flight operations are aware of any changes or conditions that may impact their planned activities. Pilots are expected to review NOTAMs prior to flight as part of their pre-flight planning process, which underscores the importance of being informed about current and relevant information in the airspace they plan to operate in.

The other choices reflect terms that do not align with established aviation terminology or practices, making "Notice to Airmen" the correct and appropriate definition of NOTAM.