VOR Cross Radials and FAF?

[Justino]

Can I "legally" use a vor cross radial, not a approach transition route, to ident a FAF on a LOC course?

I have called AOPA and they had no clue. I can't find it anywhere. Is it a legal substitute for a radar fix (triangle depiction) on the Jepp plates (see MKE Loc 25L)


Thanks

Justin

 

[TonyC]

Can I "legally" use a vor cross radial, not a approach transition route, to ident a FAF on a LOC course?

I have called AOPA and they had no clue. I can't find it anywhere. Is it a legal substitute for a radar fix (triangle depiction) on the Jepp plates (see MKE Loc 25L)


Thanks

Justin

It's not often that I have my Jepps sitting next to me, but since I do, here goes:


JEPPESEN Introduction Page 105, APPROACH CHART LEGEND APPROACH PLAN VIEW:

Right hand column, about halfway down, in reference to the point called TOWER: "The STO R-275* has a small arrowhead and is a cross radial forming Tower." On the previous page, right column, 2/3 down is the text "VOR cross radials and NDB bearings forming a position fix are 'from' a VOR and 'to' an NDB."


The triangle you see on the MKE LOC Rwy 25L is a Non-Compulsory Airspace Fix (Ref. INTRO page 105, upper left hand corner). Under the 2nd diagram on Jepps INTRO pg. 105 is the text, "Allowable substitutions for identifying a fix are noted in the planview." The IAF FAHEY can be defined three ways:

1. On the Localizer at 6.8 DME on the ILS IPXY DME
2. At the intersection of the Localizer and the HRK 010 Radial
3. By Radar

Radar is an OPTIONAL way of defining the fix. Notice that RADAR is not even required to fly the approach. (DME is not required to fly the approach, either. What you DO need is DME or another VOR receiver for the HRK 010 Radial or Radar to define FAHEY.) The Triangle doesn't mean RADAR FIX, and the words "RADAR FIX" shouldn't confuse the issue. The triangle is simply a Non-Compulsory Fix, and there are multiple ways to find it.


By the way, BAE also has an arrow (109 Radial) pointing at FAHEY, but it has a LARGE arrowhead - - it is an approach transition. It does NOT define FAHEY. If it defined FAHEY, it would also have a SMALL arrowhead (that's right, 2 arrowheads).
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[midlifeflyer]

I'm looking at the NACO chart for the same approach. http://naco.faa.gov/d-tpp/0408/00262L25L.PDF

The answer is yes, for the reasons that Tony says. This type of symbol is common to both Jepp and NACO. FAHEY is identifiable in three ways: radar, DME or cross-radial. That thin line with the arrow indicating the HOR 010° Radial is the indication of a radial identifying an intersection.

 

[Justino]

Thanks midlifeflyer! Cool website also!