plate question

[Andrey Serbinenko]

After looking at the ILS-Z approach in NC that was discussed here some time
ago, I was curious how many similar approaches there are, and if they all
are military. Thanks to the uniform naming NACO uses for its chart files,
it was fairly easy to get a list of all the ILS-Z approaches: there aren't
that many, probably a dozen, and all of them are military -- usually there
would be two -- a Z GPS approach, and a Y RNAV counterpart.
But for one place:
http://www.naco.faa.gov/d-tpp/0610/00641IY12.PDF
There's only ILS-Y approach here, and no Z approach. Does anyone know
why there's no Z?


Andrey

[Jose[_1_]]

> There's only ILS-Y approach here, and no Z approach. Does anyone know
> why there's no Z?

Just a guess... maybe there was one and it was decomissioned. Changing
the names around would invite disaster (though that doesn't stop them
from changing taxiways areound)

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
for Email, make the obvious change in the address.

[Bob Gardner]

This comes from the TERPs, and applies to all approaches, not only military
approaches:

"Where more than one approach using the same final approach guidance is
developed to the same runway, identify each for the runway/navigational aid
combination with alphabetical suffix beginning at the end of the alphabet;
e.g., ILS Z RWY 28L (first procedure), ILS Y RWY 28L (second procedure), ILS
X RWY 28L (third procedure), etc."

Bob Gardner

"Andrey Serbinenko" > wrote in message
...
>
> After looking at the ILS-Z approach in NC that was discussed here some
> time
> ago, I was curious how many similar approaches there are, and if they all
> are military. Thanks to the uniform naming NACO uses for its chart files,
> it was fairly easy to get a list of all the ILS-Z approaches: there aren't
> that many, probably a dozen, and all of them are military -- usually there
> would be two -- a Z GPS approach, and a Y RNAV counterpart.
> But for one place:
> http://www.naco.faa.gov/d-tpp/0610/00641IY12.PDF
> There's only ILS-Y approach here, and no Z approach. Does anyone know
> why there's no Z?
>
>
> Andrey
>

[Brad[_1_]]

Andrey Serbinenko wrote:
> After looking at the ILS-Z approach in NC that was discussed here some time
> ago, I was curious how many similar approaches there are, and if they all
> are military. Thanks to the uniform naming NACO uses for its chart files,
> it was fairly easy to get a list of all the ILS-Z approaches: there aren't
> that many, probably a dozen, and all of them are military -- usually there
> would be two -- a Z GPS approach, and a Y RNAV counterpart.
> But for one place:
> http://www.naco.faa.gov/d-tpp/0610/00641IY12.PDF
> There's only ILS-Y approach here, and no Z approach. Does anyone know
> why there's no Z?
>
>
> Andrey

There is, but it looks like its a "special", meaning it is not a public
procedure...see link below

http://avn.faa.gov/acifp.asp?search=EAT&stateSearch=&select=&submit1=Search

[Andrey Serbinenko]

Interesting... it looks like they had two preliminary drafts for the ILS,
and the combination of them has become the published "Y" procedure
(it has vertical profile of the "Z" draft, and missed approach of the "Y"
draft, 19-dme arc of the "Z" draft, and minimums of the "Y" draft).
Thanks for the link!

> There is, but it looks like its a "special", meaning it is not a public
> procedure...see link below
>
> http://avn.faa.gov/acifp.asp?search=EAT&stateSearch=&select=&submit1=Search
>