What is the Final Approach Fix for a Non-Precision Approach?

Question

BlackTom AI · Accepted Answer

To tackle the question, let's break down what is being asked and what each option implies about the Final Approach Fix (FAF) for a Non-Precision Approach.
Option 1: 'A specified fix (DME or intersection)'. This aligns with the standard definition of the FAF for non-precision approaches, where the final approach segment begins at a defined fix—often a named fix, a DME distance, or a named intersection. The FAF marks the point from which you start the final approach segment at or above the published altitude and proceed to the missed approach point.
Option 2: 'Intercepting the Glideslope at a given altitude'. Intercepting a glideslope is characteristic of precision approaches (like ILS) where a glideslope is part of the guidance. Non-precision approaches do not have a glideslope to intercept, since they provide lateral guidance and a step-down or constant descent angle without vertical guidance. Therefore this description does not describe the FAF for a non-precision approach.
Option 3: 'The transition from the STAR to the Approach'. The transition from a STAR (Standard Terminal Arrival Route) into an approach is a routing/ sequencing phase that occurs prior to reaching the beginning of the approach itself. It is not the FAF, which is specifically the point at which the final approach segment begins, defined for the purpose of the approach procedure rather than the transition segments.
In summary, the FAF concept for non-precision procedures hinges on identifying a defined point such as a specified fix, a DME distance, or an intersection from which the final approach segment commences. The other options describe aspects that either belong to other procedure elements (glideslope for precision approaches) or to pre-approach routing (STAR-to-Approach transition) rather than the FAF of a non-precision approach.

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