What does NOTAC stand for?

NOTAC stands for "Notice to Aircraft Commander." This term is used within aviation to provide vital information to the aircraft commander about operational considerations or changes that might affect the flight. In aviation communication, a NOTAC serves as an official notice outlining instructions or other critical data that the commander needs to be aware of prior to or during flight operations.

The other options depict terms that are not recognized in standard aviation terminology or are inaccurately defined. For example, "Notification to Armed Cargo" and "Notice of Aircraft Control" do not align with common industry definitions. While "National Operational Transport Advisory Council" is a plausible concept, it doesn't relate to the established meaning of NOTAC in aviation contexts. Thus, the correct answer clearly identifies a specific term used in the aviation field.