Aircraft Operations. Volume II - Construction of Visual and Instrument ...

II-2-1-2 Procedures — Aircraft Operations — Volume II
1.3.3.4 In the final approach and missed approach areas, those areas bounded by the lines joining points D, D”, E”
and E are treated as secondary areas.
1.3.3.5 The final approach/initial missed approach areas terminate at the end of the transitional tolerance area as
determined in the general criteria (see Part I, Section 4, Chapter 6; see also Part I, Section 2, Chapter 2, 2.6.4.2, “Use of
75 MHz marker beacon” and Part I, Section 4, Chapter 6, 6.1.6.2, “Determining SOC with an MAPt defined by a
navigation facility or fix” for use of markers as missed approach points).
1.3.3.6 For turning missed approaches the general criteria in Part I, Section 4, Chapter 6, 6.4, “Turning missed
approach” may be applied from the end of the transitional tolerance area.
1.3.3.7 The straight missed approach area is defined by the width of the 300 m (984 ft) Y surface contour to point
E” (see Figure II-2-1-1) after which the splay increases to 15 degrees.
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1.3.4 Obstacle clearance
The MOC is 75 m (246 ft) in the primary area, reducing to zero at the outer edges of the secondary areas. The general
criteria apply except that obstacles in the secondary areas underlying the OAS Y surfaces are only considered if they
penetrate those surfaces, in which case the required obstacle clearance is determined as in Part I, Section 2, Chapter 1,
Figure I-2-1-3, and Figure II-2-1-2. See item b) in Part I, Section 4, Chapter 5, 5.4.5, “MOC and OCA/H adjustments”
for increased MOC due to excessive length of final segment and Part I, Section 2, Chapter 1, 1.5, “Increased
altitudes/heights for mountainous areas” regarding increased altitudes/heights for mountainous areas.
1.3.5 Descent gradient for an ILS procedure with glide path inoperative
This type of procedure is associated with glide path failure. Therefore it is recommended, when possible, to specify the
same descent gradient for both the ILS procedure with glide path inoperative and the corresponding ILS procedure (see
Annex 4, 11.10.8.5).
1.3.6 Promulgation
1.3.6.1 The general criteria in Part I, Section 2, Chapter 1, 1.10, “Promulgation” apply. The instrument approach
chart for a localizer-only approach procedure shall be identified by the title LLZ RWY XX. If the localizer-only
approach is published on the same chart as the ILS approach, the chart shall be entitled ILS or LLZ RWY XX. If a
DME is required it shall be indicated in a note on the chart.
1.3.6.2 For promulgation of procedure altitudes/heights and the descent gradient/angle for an ILS procedure with
glide path inoperative, see Part I, Section 4, Chapter 5, 5.5, “Promulgation”.