What does "AC" stand for in aviation terms?

In aviation, "AC" stands for Advisory Circular. Advisory Circulars are issued by the Federal Aviation Administration (FAA) to provide guidance and information to the aviation community. They serve as important resources for understanding regulatory requirements, practices, and safety guidelines. Advisory Circulars are not legally binding but are widely used as references that help in compliance with aviation regulations and standards. They cover a variety of topics, including operational procedures, maintenance practices, and regulatory interpretations, ensuring that stakeholders like airport managers and airline operators are informed about best practices and safety concerns.

Other choices do not accurately represent the standard meaning of "AC" in the aviation context. For example, Aeronautical Communication, Aircraft Control, and Airspace Coordination are terms used within the industry but do not encapsulate the recognized definition associated with the acronym "AC" as Advisory Circular does. Understanding the role of Advisory Circulars helps aviation professionals stay updated on essential knowledge that governs airport and aircraft operations.