Are there ILS approaches where the LOC/non-precision procedure isn't authorized?


Yes, there are.

Note: This is as opposed to those ILS approaches listed as ILS or LOC in the title—such as KGEG ILS or LOC RWY 3—which do have an authorized LOC approach.

Special Authorization Cat I ILS, and Cat II & III ILS approaches do not have authorized LOC procedures. These are precision only approaches.

See KGEG approaches, for example. Specifically, the ILS RWY 3 (SA CAT I), and the ILS RWY 3 (CAT II & III) approaches do not have authorized LOC procedures.

See also this screen cap of the KGEG ILS RWY 21 (SA CAT I) approach:

[enter image description here][6]

  • 1
    $\begingroup$ the SA approach gets 50 foot lower DH than the ILS/LOC 3. Its not clear that the ILS/LOC 3 is a completely different approach, even though it has a different plate. The LOC 3 minima are typical for a LOC approach $\endgroup$ – rbp Mar 9 '16 at 19:58
  • 1
    $\begingroup$ @rbp I'm not sure what you are trying to say. Do you consider Cat II & III approaches to be the same approach as their higher DA Cat I counterparts? If a distinct plate is not the denotation of a distinct approach, what is? $\endgroup$ – J Walters Mar 10 '16 at 13:52
  • 1
    $\begingroup$ I'm trying to point out that there's something going on here that's unclear. The CAT I SA approach is clearly a derivative of the ILS approach, as is the CAT II & CAT III. But why isn't the CAT I approach melded into the CAT II & CAT III plate, with another "CATEGORY" entry? And why are the CAT II and the CAT III approaches not separated into two separate plates, since they share differ in the same way as CAT I SA and CAT II? $\endgroup$ – rbp Mar 10 '16 at 21:58
  • $\begingroup$ @rbp I don't know. Seems pretty standard to me. See these three KMSP ILS 12L approaches: CAT I, SA CAT I, and CAT II & III. I suppose you could ask a new question about that, if you'd like. $\endgroup$ – J Walters Mar 10 '16 at 22:06
  • 2
    $\begingroup$ @sean Links to specific approaches have been removed. I do not know of a way to link directly to these as the URLs are updated every 28 days. $\endgroup$ – J Walters Mar 25 '19 at 20:30

Van Nuys has two, ILS Y RWY 16R and ILS Z RWY 26R. Both use the localizer on 111.3 but have different stepdown fixes and different missed approaches. Radar is required for the missed on Z.




Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.