How to determine where outbound timing begins in a holding pattern?

Outbound timing in a holding pattern is crucial for maintaining proper spacing between aircraft and complying with air traffic control instructions. In a holding pattern, the outbound leg timing begins when an aircraft reaches a specified point in relation to the holding fix. This point can either be directly over the fix or when the aircraft is abeam the fix.

The correct approach is to determine outbound timing based on whichever event occurs later—either being over the fix or abeam the fix. This means that if the aircraft passes the fix first before becoming abeam, timing will begin when it is abeam as this point signifies that the aircraft is transitioning to the next segment of its holding maneuver.

This methodology ensures that the aircraft is given an adequate outbound leg duration based on its position relative to the holding fix, thus maintaining the integrity of the holding pattern and allowing for more predictable separation between aircraft. By using the later event for timing initiation, it also addresses any potential discrepancies that may arise due to wind or adjustments made during the hold.