ILS Z 와 Y 차이점

[AARON]

한개의 활주로에 한개의  Facility를 이용하여 복수의 접근절차가 있는 경우는

여러가지 이유가 있습니다.

해당 VOR 관련하여 실패접근 절차가 다른경우,

RDR Coverage가 변경될 경우 등이 있습니다

FAA에서 발행한 "INSTRUMENT PROCEDURE HANDBOOK(2008) CHAPTER 5 APPROACH'편을 보시면  RWY에 같은 형태의 직진입 접근(예를 들어 KIX ILS APPROACH RWY06) 두 개 이상이면 착륙최저치가장 낮은 것부터 알파벳 Z부터 역순으로 부여하는 것으로 되어 있습니다

APPROACH CHART NAMING CONVENTIONS

Individual NACO charts are identified on both the top and the bottom of the page by their procedure name (based on the NAVAIDs required for the final approach), runway served, and airport location. The identifier for the airports also listed immediately after the airport name.

There are several types of approach procedures that may cause some confusion for flight crews unfamiliar with the naming conventions. Although specific information about each type of approach will be covered later in this chapter, here are a few procedure names that can cause confusion.

STRAIGHT-IN PROCEDURES

When two or more straight-in approaches with the same type of guidance exist for a runway, a letter suffix is added to the title of the approach so that it can be more easily identified. These approach charts start with the letter Z and continue in reverse alphabetical order.

For example, consider the RNAV (GPS) Z RWY 13C and RNAV (RNP) Y RWY 13C approaches at Chicago Midway International Airport. Although these two approaches can both be flown with GPS to the same runway they are significantly different, e.g., one is a “"SPECIAL AIRCRAFT & AIRCREW AUTHORIZATION REQUIRED (SAAAR); one has circling minimums and the other does not; the minimums are different; and the missed approaches are not the same. The approach procedure labeled Z will have lower landing minimums than Y (some older charts may not reflect this). In this example, the LNAV MDA for the RNAV (GPS) Z RWY 13C has the lowest minimums of either approach due to the differences in the final approach ROC eval‎uation. This convention also eliminates any confusion with approach procedures labeled A and B, where only circling minimums are published. The designation of two area navigation (RNAV) procedures to the same runway can occur when it is desirable to accommodate panel mounted global positioning system (GPS) receivers and flight management systems (FMSs), both with and without VNAV. It is also important to note that only one of each type of approach for a runway, including ILS, VHF omnidirectional range (VOR), non-directional beacon (NDB), etc., can be coded into a database.

[굿샷]

이는 대부분 분리의 목적으로 사용됩니다.
나리따를 보실 경우 GS INTERCEPT ALT 차이가 있을 뿐입니다.
FMGC 상에서 필요한 Waypoint를 만들어 연결시키면 됩니다.

[한경건]

궁굼했었는데,,, 좋은정보 감사합니다.

[pegasus]

very good information

[AARON]

접근 챠트를 보면 알 수 있습니다.

1. RKPC Y 와Z
ð 접근에 요구되는 장비가 다름

2. RJBB Y 와Z
ð FAF 가 다름

3. RJAA Y 와Z
ð FAF 가 다름

[굿샷]

jeppesen에 보면 동일 계기접근시설에 대해 다른 접근절차를 만들 때 알파벹 역순으로 붙이게 되어 있습니다.
GS Intercept ALT가 틀리기 때문에 FAF가 다를 수 있습니다만 요구되는 Ground Base Facility는 동일한 LOC 및 GS ANT를 사용합니다.