vtx531

I've been trying to ask everyone possible and nobody has given me an answer that isn't a guess.

Some approach procedures are titled, ex: "ILS or Localizer 23R" and some are just titled, ex: "ILS 23R". The title that only says "ILS" still has localizer only minimums. What's the difference????

-Chris M.

Squawk_5543

If the approach says ILS or Localizer then you have the option to shoot the approach as either a precision (ILS) or a non-precision (Localizer) approach. An ILS approach has LOC only mins so that if the glide slope is out of service an approach can still be made, just to higher mins.

joepilot

You are correct, of course, but you didn't address the question asked.

I don't know the answer to the question asked.

Joe

Slice

Sounds like he answered it to me.

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rustypigeon

I can't quite answer the question. But I can tell you this... The plates used to always say just "ILS". A few years ago they started adding the "ILS or LOC" when the new revisions came out. I don't know that anything other than the name has changed because you could always use the LOC minimums even when it just said "ILS"

carlwag

Here is the way that I understand this: It used to be that an ILS approach chart only said ILS 23R and had glide slope minimums and glideslope out minimums. Most people referred to an approach with the glideslope out as a Localizer approach. The ATIS would refer to a Localizer approach, and the controller would clear you for a Localizer approach. But the poor pilot from a foreign country looking through his Jeppesen charts could not find a chart entitled LOC 23R. Most of us in the US knew that the ILS approach plate was the one to use, but not everyone did. In the interest of standardization and making it easier for the worldwide pilots, all ILS approaches are being changed to ILS or LOC 23R, so that it is more clear to everyone.

DamonMeyer

The reason for the naming is to allow planes without the ILS (GS) to be cleared for (and fly) the approach?

Mason32

So why are there LOC mins on the ILS only chart then.....

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ugleeual

The title of an approach is the equipment required to shoot the final approach... if "cleared for the ILS" then you should use glidepath and localizer guidance... if "cleared for the localizer" then you should use MDA as your lowest altitude... if you are getting a "usable GS" then its your option to use a constant descent profile to hit VDP above the MDA... hope this helps.

Texandrvr

This was covered about a year and a half ago. A search would have had trouble finding it because of all the dashes in the title:

ILS vs. ILS or LOC approaches....???

It seems that most civilians don't do it, but it is perfectly legal to fly a localizer if you are cleared to "Fly the ILS..." Military pilots do it daily. Over and over again, ad nauseum. However, not the other way around. If you are cleared the "Localizer approach..." you cannot fly the ILS because the gs is not part of the localizer approach.