Which document outlines the responsibilities and procedures for airline operations?

The Flight Operations Manual is the key document that outlines the responsibilities and procedures for airline operations. This manual serves as a comprehensive reference for flight crew members and operational staff, detailing standard operating procedures, safety protocols, and compliance requirements that must be followed during operations. It includes information on pre-flight planning, in-flight procedures, emergency protocols, and the roles and responsibilities of various team members involved in flight operations.

In contrast, the other options serve different purposes. The Operational Safety Plan typically focuses on safety measures and risk management but does not provide the detailed operational procedures that the Flight Operations Manual does. An Aviation Safety Audit is an evaluative process meant to assess compliance with aviation standards and regulations, rather than a practical guide for daily operations. A Regulatory Compliance Checker generally refers to tools or systems used to ensure adherence to regulations but lacks the comprehensive operational guidance found in a Flight Operations Manual. Thus, the Flight Operations Manual is the foundational document specifically intended for guiding airline operations.