Thread: Glide Slope...
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Old 11-06-2006, 02:09 PM
  #21  
3664shaken
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Joined APC: Nov 2006
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Lots of confusion on this topic.

According to TERPS

GlideSlope Intercept Altitude (GSIA) = The minimum (and maximum) altitude that you are authorized to intercept the glideslope/path on a precision approach (unless an alternate lower altitude is depicted and ATC clears you to that altitude for the glideslope intercept). The intersection of the published intercept altitude with the glideslope/path. The altitude and location of the lightning bolt symbol (end of feather on jepps) is the highest altitude at which glide slope can be used for primary guidance.

Final Approach Segment = shall begin at the point where the glideslope is intercepted, and designated FAF. At locations where it is not possible for the point of glideslope intercept to coincide with a designated FAF, the point of glideslope interception shall be located PRIOR to the FAF.

So yes we do have a FAF on an ILS it is GSIA. While this fix may not always be the same we have to have a FAF otherwise a part 135/121 pilot has no way to determine if the approach can continue if newly reported weather drops below minimums. (135.225 121.651)

Good discussion though.
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