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

Part III — Section 3, Chapter 6 III-3-6-19
6.8.3 Minima box
A table of OCA/H values for each aircraft category may be promulgated for Cat I operations at the particular airfield.
6.8.4 Procedures involving non-standard glide path angles
Procedures involving glide paths greater than 3.5 degrees or any angle when the nominal rate of descent exceeds 5 m/s
(1 000 ft/min), are non-standard and subject to restrictions (see 6.4.8.8.3.1). They are normally restricted to specifically
approved operators and aircraft, and are promulgated with appropriate aircraft and crew restrictions annotated on the
approach chart.
6.8.5 Additional gradient for the final missed approach segment
If obstacles identified in the final missed approach segment result in an increase in any of the OCA/H calculated for the
precision segment, an additional steeper gradient may also be specified for the gradient of the missed approach surface
(Z) for the purpose of lowering the OCA/H (see Part I, Section 4, Chapter 6, 6.2.2.2, “Climb gradient in the
intermediate phase”).
6.8.6 Turns
6.8.6.1 Turn at a designated altitude/height. If the turn point is located at the SOC, the chart shall be annotated
“turn as practicable to... (heading or facility)” and shall include sufficient information to identify the position and
height of the obstacles dictating the turn requirement.
6.8.6.2 Turn at a designated TP. Where the procedure requires that a turn be executed at a designated TP, the
following information must be published with the procedure:
a) the TP, when it is designated by a fix; or
b) the intersecting VOR radial, NDB bearing, or DME distance where there is no track guidance (see Part I,
Section 2, Chapter 2, 2.6.4, “Missed approach fixes”).
Table III-3-6-1. Minimum distance between final approach and glide path interceptions
Intercept angle with
final approach (degrees) Cat A/B/H Cat C/D/DL/E
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 3.7 km (2.0 NM) 4.6 km (2.5 NM)
61 — 90
or within a racetrack
or reversal procedure
3.7 km (2.0 NM) 5.6 km (3.0 NM)
23/11/06