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

I-4-3-App A-6 Procedures — Aircraft Operations — Volume II
23/11/06
D = 4.6 km (2.5 NM) when it is defined by the intersection of VOR radials;
D = 1.9 km (1.0 NM) when it is defined by the VOR/DME indication.
b) Inner edge, secondary area. The secondary area associated with the first leg of the initial approach will end on
the inside of the turn over this straight line.
c) Outer edge, primary area. This is defined by:
1) an arc of a circle centred on the start point of the turn whose radius R is a function of aircraft speed and
altitude. Tables I-4-3-App A-8 and I-4-3-App A-9 give the values of the radius R;
2) a straight line which is tangent to the arc of circle and which splays outward at an angle θ to the dead
reckoning track according to speed where:
θ = 22° for IAS 165/335 km/h (90/180 kt);
θ = 14° for IAS 335/465 km/h (180/250 kt);
3) a straight line from point A to point C, splayed at an angle of 15° from the intermediate approach track
where:
Point A is on the OAS X surface abeam the final approach point (FAP); and
Point C is abeam the intermediate approach fix (IF); and
4) a straight line originating from point C parallel to the intermediate approach track.
d) Outer edge, secondary area. The secondary area is located outside of the turn preceding the dead reckoning
segment. It is extended up to the outer limit of the protection area defined above.
4.2 Areas associated with the S-type procedures (see Figures I-4-3-App A-5 and I-4-3-App A-6)
a) Area for the first leg of the initial approach. See Part III, Chapter 4, 4.3.3, “Area”.
b) Area for the turn and the dead reckoning segment.
1) Outer edge. This is formed by a straight line joining point A to point S. Point A is located abeam the FAP
on the OAS X surface; point S is located abeam the start point of turn on the outer edge of the initial
approach area.
2) Inner edge.
i) First locate point B' on the first leg at a distance from the start point of the turn equal to:
1.9 km (1.0 NM) if the start point is defined by VOR/DME reference;
3.7 km (2.0 NM) if the start point is defined by VOR intersection.
ii) Identify point B abeam B' at a distance of 9.3 km (5.0 NM).