What is the delay in pilot reaction time for recognizing fix passage that is taken into account in holding pattern design criteria?

In holding pattern design criteria, a delay of 6 seconds is factored in as the average pilot reaction time for recognizing fix passage. This time accounts for the period it takes for a pilot to perceive that the aircraft has reached the designated fix and to respond accordingly.

Creating effective holding patterns involves anticipating pilot actions, and the 6-second delay ensures that the design will accommodate normal responsiveness. This time frame is crucial when determining the dimensions of the holding pattern, ensuring that safe and efficient procedures can be established for the aircraft’s navigation. An understanding of this reaction time helps in creating adequate spacing and timing in holding procedures, which is vital for maintaining safety and efficiency in busy airspace.