Question about KNYL ILS or LOC 21R

[C177pilot]

The NYL NavAid is a TACAN. So in a civilian A/C how does one identify the FAF since it's is 6.9 DME from NYL? Does this mean Radar service is required? I don't see that noted. Practically I could use the GPS, but I don't know how to identify the FAF any other way.
I'm just now working on my instrument rating, so this may be a dumb question. But I'll learn something I don't currently know at least.

Thanks,
Chris

[Ryan B]

It has DME though on 113.70 - which you should be able to tune.

[C177pilot]

How do you know this from the chart. I found it on a cross reference table but the chart does not have that info that I can find.

[Ryan B]

It's on the low alt enroute sectional chart (use skyvector)

But I agree it's not on the IAP. I guess the keyword if you're not using the ILS is "LOC/DME" Plus if you were flying there in real life IFR you'd probably have a low alt chart handy (or foreflight/EFB etc)

[Keith Smith]

I flew this during one my my Twitch streams a few months ago and ran into the same issue. It took a while to realize it was on the low enroute but not on the approach plate.

[kullery]

I don't think that this is an issue with the LOC/DME RWY 21R approach plate but is instead a problem with the X-plane database (Resources\default data\earth_nav.dat).

Per the NFDC, I-YUM (on 108.3) is DME enabled however it is not enabled in X-plane.

YUMA.jpg (98.72 KiB) Viewed 4398 times

It can be enabled by adding the following entry in the earth_nav.dat file.

Code: Select all

12  32.64682200 -114.61343600    193 10830  18       0.000 IYUM KNYL 21R DME-ILS 

With this entry, DME will be active on 108.3 and it should indicate 6.9NM when reaching DHOME.

Note: since the DME is referenced to NYL, the coordinates in this entry represent the location of NYL, which is located about midway between the IYUM glideslope and the IYUM localizer.

[ccapilot]

I think that you are confusing the title with the navaid type... the navaid type is ILS, that means without DME... Take a look at this other example from Teterboro, where we have two ILS, one without DME and the ILS 19 with DME..

As you can see the title is always ILS/DME, however the type of navaid is indicated along each specific runway end line. In this case the ILS 06 does not have DME, but the ILS 19 has...

TEB.jpg (100.96 KiB) Viewed 4390 times

Regards:
Cristian

[kullery]

AHHH, Thanks Cristian.....

Yes, I saw "DME" in the heading and I assumed (always dangerous) that it applied to all entries in that section.

[HRutila]

I think that you are confusing the title with the navaid type... the navaid type is ILS, that means without DME...

That's not quite correct. The ILS may still have DME, but if the approach title is ILS/DME, it means the ability to receive DME is required to fly the approach. Some ILSs have DME but do not require aircraft flying the approach to be able to receive it. For example, Denver (DEN) has a localizer with DME installed on Runway 7, and DME distances are published on the ILS or LOC RWY 7 chart, but because the approach is not named ILS/DME or LOC/DME RWY 7 (or any combo therein), and "DME REQUIRED" does not appear in the notes or on the plan view, an aircraft does not need to have DME capabilities to fly that approach.