At what distance from a procedure point does the course reversal restriction begin?

The course reversal restriction typically begins at 10 nautical miles from the procedure point. This distance is standardized in many published Standard Terminal Arrival Routes (STARs) and Instrument Approach Procedures (IAPs) to provide pilots with a defined distance to begin their maneuvering for the course reversal. The purpose of this distance is to ensure that pilots have sufficient time and space to perform the required turn while adhering to airspace restrictions and maintaining safe separation from other traffic.

By starting the course reversal at this distance, pilots can better manage their descent, maintain proper airspeed, and execute the turn without getting too close to the procedure point. This distance establishes a clear spatial boundary for pilots, allowing them to plan their maneuvers effectively and reducing the likelihood of operational conflicts within busy airspace.