What is the purpose of Advisory Circulars in aviation?

Advisory Circulars (ACs) serve an essential role in the aviation industry by providing non-regulatory information to the aviation public, including operators, manufacturers, and maintenance personnel. These documents are published by aviation authorities, such as the Federal Aviation Administration (FAA) in the United States, to offer guidance, best practices, industry standards, and recommendations that are not legally binding but are intended to enhance safety and promote compliance with existing regulations.

For example, while regulations must be followed, ACs can explain how to comply with those regulations effectively or can provide additional insights into safety measures and operational practices that may not be strictly mandated. This supportive approach allows aviation professionals to understand and implement safer, more efficient practices while still complying with mandatory requirements.

Other options suggest responsibilities such as enforcing regulations, detailing specific aircraft designs, or defining operational protocols for flight crews. However, those tasks fall under specific regulatory requirements or other formal documentation, rather than the educational and advisory nature of Advisory Circulars. Thus, the role of providing guidance without the force of regulation distinguishes the correct purpose of ACs.