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

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I-4-3-App C-6 Procedures — <strong>Aircraft</strong> <strong>Operations</strong> — <strong>Volume</strong> <strong>II</strong><br />

Note.— Units in following formulas:<br />

23/11/06<br />

SI units Non-SI units<br />

t s s<br />

v <strong>and</strong> w’ km/s NM/s<br />

Distances Km NM<br />

The values <strong>of</strong> v, w’ <strong>and</strong> h are given by Table I-4-3-App C-1 (lines 3, 8 <strong>and</strong> 6 respectively). D is the specified DME<br />

distance expressed in km (NM) <strong>and</strong> d1 is the tolerance <strong>of</strong> this DME indication:<br />

3.2.4.2 Primary area<br />

d1 = 0.46 km (0.25 NM) + 0.0125 D<br />

a) Place the template point “a” on “Al”, with the template procedure axis parallel to the inbound track, <strong>and</strong> draw<br />

thecurve“l”(part<strong>of</strong>theoutline<strong>of</strong>thetemplate).<br />

b) In the same manner, place the template point “a” successively on “A2”, “A3” <strong>and</strong> “A4” to draw curves “2”, “3”<br />

<strong>and</strong> “4”.<br />

c) Draw the common tangents to curves “1” <strong>and</strong> “2”, “2” <strong>and</strong> “4”, “3” <strong>and</strong> “4” <strong>and</strong> the tangent from “0” to curve<br />

“l” <strong>and</strong> from “0” to curve “3”.<br />

3.2.4.3 Secondary area. Draw the secondary area limit at a distance <strong>of</strong> 4.6 km (2.5 NM) from the boundary <strong>of</strong> the<br />

primary area.<br />

3.2.5 Interface between initial segment area <strong>and</strong> base <strong>and</strong> procedure turn areas<br />

3.2.5.1 General. The primary area <strong>of</strong> the initial segment, the boundaries <strong>of</strong> which are 4.6 km (2.5 NM) apart from<br />

the nominal path, shall be blended with the primary area <strong>of</strong> the turn procedure, which is described above in 3.1.2 (base<br />

turn) <strong>and</strong> 3.2.4 (procedure turn). The secondary areas <strong>of</strong> the two phases <strong>of</strong> the procedure shall be blended so that a<br />

constant width <strong>of</strong> 4.6 km (2.5 NM) is respected.<br />

3.2.5.2 <strong>Construction</strong> <strong>of</strong> the secondary area outerboundary (see Figures I-4-3-App C-6 <strong>and</strong> I-4-3-App C-7). On<br />

one side <strong>of</strong> the initial segment path the outer boundaries <strong>of</strong> the two secondary areas will intersect. On the other side <strong>of</strong><br />

the initial segment path, the outer boundary <strong>of</strong> the secondary area consists <strong>of</strong> an arc <strong>of</strong> circle, 9.2 km (5 NM) from the<br />

facility, <strong>and</strong> the tangent to that circle <strong>and</strong> the outer boundary <strong>of</strong> the secondary area <strong>of</strong> the turn.<br />

3.2.5.3 <strong>Construction</strong> <strong>of</strong> the primary area boundary. The boundary <strong>of</strong> the primary area is drawn in 4.6 km<br />

(2.5 NM) from the outer boundary <strong>of</strong> the secondary area.<br />

3.3.1 General<br />

3.3 Protection area <strong>of</strong> racetrack <strong>and</strong> holding procedures<br />

Note.— The methods described in this paragraph are related to right turn procedures. For left turn procedures, the<br />

corresponding areas are symmetrical with respect to the inbound track.

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