Aircraft Operations

Part III — Section 2, Chapter 1
III-2-1-5
c) When vectoring to intercept the ILS localizer course or MLS final approach track, the final vector shall be such
as to:
1) allow the aircraft to intercept the ILS localizer course or MLS final approach track at an angle not greater
than 30 degrees; and
2) provide at least 2 km (1.0 NM) straight and level flight prior to ILS localizer course or MLS final approach
track intercept.
The vector shall also be such as to enable the aircraft to be established on the ILS localizer course or MLS final
approach track in level flight for at least 3.7 km (2.0 NM) prior to intercepting the ILS glide path or specified
MLS elevation angle.
d) Each pair of parallel approaches will have a “high side” and a “low side” for vectoring to provide vertical
separation until aircraft are established inbound on their respective parallel ILS localizer course and/or MLS
final approach track. The low side altitude will normally be such that the aircraft will be established on the ILS
localizer course or MLS final approach track well before ILS glide path or specified MLS elevation angle
interception. The high side altitude will be 300 m (1 000 ft) above the low side.
e) When the aircraft is assigned its final heading to intercept the ILS localizer course or MLS final approach track,
it shall be advised of:
1) its final heading to intercept the ILS localizer course (or MLS final approach track);
2) the altitude to be maintained until both:
i) the aircraft is established on the ILS localizer centre line (or MLS final approach track); and
ii) the aircraft has reached the ILS glide path (or specified MLS elevation angle) intercept point; and
3) if required, clearance for the final approach.
f) If an aircraft is observed to overshoot the ILS localizer course or MLS final approach track during turn-to-final,
the aircraft will be instructed to return immediately to the correct track. Pilots are not required to acknowledge
these transmissions or subsequent instructions while on final approach unless requested to do so.
g) Once the 300 m (1 000 ft) vertical separation is reduced, the radar controller monitoring the approach will issue
control instructions if the aircraft deviates substantially from the ILS localizer course or MLS final approach
track.
h) If an aircraft that deviates substantially from the ILS localizer course (or MLS final approach track) fails to take
corrective action and penetrates the NTZ, the aircraft on the adjacent ILS localizer course (or MLS final
approach track) will be instructed to immediately climb and turn to the assigned altitude and heading in order to
avoid the deviating aircraft.
1.5.2 Where parallel approach obstacle assessment surfaces (PAOAS) criteria are applied for obstacle assessment,
the heading instruction shall not exceed 45° track difference with the ILS localizer course (or MLS final approach
track). The air traffic controller shall not issue the heading instruction to the aircraft below 120 m (400 ft) above the
runway threshold elevation.
1.5.3 Due to the nature of this break-out manoeuvre, the pilot is expected to arrest the descent and immediately
initiate a climbing turn.
23/11/06