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

II-2-6-4 Procedures — Aircraft Operations — Volume II
The general criteria of Part III, Chapter 6, 6.3 apply.
23/11/06
6.4.5 Descent gradient
6.4.6 Computation of altitudes/heights
Altitudes/heights through which the aircraft should pass to maintain the required descent path should be computed for
each 2 or 1 km (1 or 1/2 NM) from touchdown assuming a 15 m (50 ft) height at the runway threshold. The resultant
altitudes/heights should be rounded out to whole 10 m or 100 ft increments, except for distances less than 4 km (2 NM)
from touchdown, where they should be rounded up to the next whole 10 m or 10 ft increment as appropriate.
Precomputed altitudes/heights should be available to the radar controller and published in aeronautical information
publications.
6.5 MISSED APPROACH SEGMENT
A surveillance radar approach shall be terminated 4 km (2 NM) before the threshold, except that when approved by the
appropriate authority, it may be continued to a point not later than the runway threshold when the accuracy of the radar
permits. The missed approach point (MAPt) is located at the point where the radar approach terminates. See
Figure II-2-6-3 and Part I, Section 4, Chapter 6 for missed approach criteria.
Table II-2-6-1. Minimum length of intermediate segment
Intercept angle
with localizer
(degrees)
Minimum distance between localizer
and glide path interceptions
Cat A to E Cat H
0 – 15 2.8 km (1.5 NM) 2.8 km (1.5 NM)
16 – 30 3.7 km (2.0 NM) 3.7 km (2.0 NM)
31 – 60 4.6 km (2.5 NM) 3.7 km (2.0 NM)
61 – 90 5.6 km (3.0 NM) 3.7 km (2.0 NM)