Aircraft Operations

I-6-1-4
Procedures — Aircraft Operations — Volume I
2) along a published track; and
3) by radar vectoring, when aircraft must be established on prescribed protected flight paths.
b) The entry point may be either of the following two options:
1) the holding fix: In this case, the aircraft will arrive at the entry point by means of:
i) the VOR radial for the inbound leg; or
ii) the DME arc defining the holding fix.
2) the fix at the end of the outbound leg: In this case, the aircraft will arrive at the entry point by means of the
VOR radial passing through the fix at the end of the outbound leg.
1.4.8.2 It is also possible to make use of guidance from another radio facility (e.g. NDB). In that case, protection
of the entry should be the subject of a special study based on general criteria.
1.4.8.3 The radius of a DME arc used as guidance for arrival at a VOR/DME holding should be not less than
18.5 km (10 NM).
1.4.8.4 Minimum length for the last segment of the arrival track
The minimum length for the last segment of the arrival track, which terminates at the entry point, depends on the angle
() between that segment and the preceding segment (or radar path). The various values are shown in Table I-6-1-3.
1.4.8.5 Method of arrival at a VOR/DME holding and the corresponding entry procedures
Where the entry point is the holding fix:
a) Arrival on the VOR radial for the inbound leg, on the same heading as the inbound track (see Figure I-6-1-3 A).
The arrival path (or its last segment) is aligned with the inbound track and follows the same heading. The entry
consists of following the holding pattern.
b) Arrival on the VOR radial for the inbound leg, on a heading reciprocal to the inbound track (see
Figure I-6-1-3-B).
1) On arrival over the holding fix, the aircraft turns onto the holding side on a track making an angle of 30°
with the reciprocal of the inbound track, until reaching the DME outbound limiting distance.
2) At this point it turns to intercept the inbound track.
3) In the case of a VOR/DME holding entry away from the facility with a limiting radial, if the aircraft
encounters the radial ahead of the DME distance, it must turn and follow it until reaching the DME
outbound limiting distance, at which point it turns to join the inbound track.
c) Arrival on the DME arc defining the holding fix, from the non-holding side (see Figure I-6-1-3 C).
1) On arrival over the holding fix, the aircraft turns and follows a track parallel to and on the same heading as
the outbound track.
23/11/06