ILS vs ILS OR LOC

flyf15

Well-known member
Joined
Jul 13, 2004
Posts
548
Total Time
5700
Pretty simple question that I can't find the answer for... why are some approaches labeled "ILS OR LOC" while others are simply "ILS" when ILS approaches can be flown localizer only anyways?
 

Kream926

pimpin' aint easy
Joined
Feb 28, 2003
Posts
1,196
Total Time
1.21
ummmm not sure.....


all the ILS apps ive seen have loc. mins w/o g.s

come to think of it, i make no sence in answering your question
 

MTpilot

Well-known member
Joined
Feb 14, 2005
Posts
291
Total Time
2000
It's all about minimums.

To be ILS or LOC it has to have different minimums for a "localizer only" approach, it is not all that common to have an ILS without other minimums but we have one here at MSO. If you lose any part of the ILS 11 approach you can't do it. You are correct in that the localizer signal will be there and you could navigate with it, but, how low could you go? where is the MAP. The key is how many different minumums does the approach have for different equipment having failed. The LOC mins will be higher than the full ILS mins.
 

CFIse

Well-known member
Joined
May 19, 2005
Posts
258
Total Time
2150
flyf15 said:
Pretty simple question that I can't find the answer for... why are some approaches labeled "ILS OR LOC" while others are simply "ILS" when ILS approaches can be flown localizer only anyways?
I believe we're in transition to the "ILS or LOC" terminology - so as NACO touches each plate it'll get re-named. I had a reference for that somewhere but can't find it - I'll look harder :)
 

midlifeflyer

Well-known member
Joined
Jan 20, 2003
Posts
2,047
Total Time
some
Does anyone have one of these to look at? My guess (that's all it is) is that where an ILS with loc-only minima have identical structures (i.e. the ILS OM and the LOC FAF are the same), in an ILS or LOC chart there may be some differences.

MTPilot, the GS-out (LOC) minimums are always different than the ILS minimums,whether or not the chart is labeled ILS or LOC.
 

CLECA

Well-known member
Joined
Jun 8, 2005
Posts
63
Total Time
7500
CFIse said:
I believe we're in transition to the "ILS or LOC" terminology - so as NACO touches each plate it'll get re-named. I had a reference for that somewhere but can't find it - I'll look harder :)
I believe that we are in a transition. However, I also believe a lot of it has to do with how it was checked and certified. I know that really doesn't answer the question "why" but I know sometimes if it listed as a ILS only and the GS is unusable you still get cleared for the "ILS GS unusable to (Insert rwy here)" as opposed to LOC only approach to rwy XX. Does that make any sense at all?
 
Top