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

II-1-3-20 Procedures — Aircraft Operations — Volume II
3.7.2.1.2 Additional values of OCA/H may be agreed upon between operators and the appropriate authority and
promulgated, on the basis of evidence supporting the modifications defined in 3.4.8.7, “Adjustment of OAS constants”.
3.7.2.1.3 Use of OCA/H values for MLS Category I approach procedures based on radio altimeter height loss
margins may be agreed upon between operators and the appropriate authority, and the values promulgated, if the
requirement of 3.4.8.8.3.3, “Radio altimeter verification” is met.
3.7.2.2 Promulgation of MLS Category III approach procedures
Category III operations may be permitted subject to the appropriate Category II OCA/H being below the height of the
Annex 14 inner horizontal surface. Category III operations may also be permitted with a Category II OCA/H between
the height of the inner horizontal surface and 60 m provided the Annex 14 Category II inner approach, inner
transitional and balked landing surfaces are extended to protect that OCA/H.
23/11/06
3.7.3 Degrees magnetic
The final approach track for the MLS procedure is always specified and promulgated in degrees magnetic.
3.7.4 Turn at a designated altitude/height (missed approach)
If the TP is located at the SOC, the chart shall be annotated “turn as soon as practicable to ... (heading or facility)” and
shall include sufficient information to identify the position and height of the obstacles dictating the turn requirement.
3.7.5 Turn at a designated TP (missed approach)
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, 2.6.5, “Missed approach fixes”).
3.7.6 Procedures involving non-standard glide path angles
Procedures involving glide paths greater than 3.5° or any angle when the nominal rate of descent exceeds 5 m/sec
(1 000 ft/min), are non-standard and subject to restrictions (see 3.4.8.8.3.1, “Height loss (HL)/altimeter margins”. They
are normally restricted to specifically approved operators and aircraft, and are promulgated with appropriate aircraft
and crew restrictions annotated on the approach chart.
3.7.7 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 purposes of lowering the OCA/H (see Part I, Section 4, Chapter 6, 6.2.3.1, “Climb gradient in the final
phase”).