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MLS final approach track unless increased longitudinal
separation is required due to wake turbulence or for other
reasons.
Note 1.— See Chapter 8, 8.7.4.4.
Note 2.— An aircraft established on an ILS localizer
course or MLS final approach track is separated from another
aircraft established on an adjacent parallel ILS localizer
course or MLS final approach track provided neither aircraft
penetrates the NTZ as depicted on the radar display.
6-10 Air Traffic Management (PANS-ATM)
1/11/01
6.7.3.2.6 When assigning the final heading to intercept
the ILS localizer course or MLS final approach track, the
runway shall be confirmed, and the aircraft shall be advised of:
a) its position relative to a fix on the ILS localizer course
or MLS final approach track;
b) the altitude to be maintained until established on the
ILS localizer course or MLS final approach track to the
ILS glide path or specified MLS elevation angle
intercept point; and
c) if required, clearance for the appropriate ILS or MLS
approach.
6.7.3.2.7 All approaches regardless of weather conditions
shall be radar-monitored. Control instructions and information
necessary to ensure separation between aircraft and to ensure
aircraft do not enter the NTZ shall be issued.
Note 1.— The primary responsibility for navigation on the
ILS localizer course and/or MLS final approach track rests
with the pilot. Control instructions and information are therefore
issued only to ensure separation between aircraft and to
ensure that aircraft do not penetrate the NTZ.
Note 2.— For the purpose of ensuring an aircraft does not
penetrate the NTZ, the aircraft is considered to be the centre
of its radar position symbol. However, the edges of the radar
position symbols representing aircraft executing parallel
approaches are not allowed to touch (see Chapter 8, 8.7.3.6).
6.7.3.2.8 When an aircraft is observed to overshoot the
turn-on or to continue on a track which will penetrate the NTZ,
the aircraft shall be instructed to return immediately to the
correct track.
6.7.3.2.9 When an aircraft is observed penetrating the
NTZ, the aircraft on the adjacent ILS localizer course or MLS
final approach track shall be instructed to immediately climb
and turn to the assigned altitude/height and heading in order to
avoid the deviating aircraft. Where parallel approach obstacle
assessment surfaces (PAOAS) criteria are applied for the
obstacle assessment, the air traffic controller shall not issue the
heading instruction to the aircraft below 120 m (400 ft) above
the runway threshold elevation, and the heading instruction
shall not exceed 45 degrees track difference with the ILS
localizer course or MLS final approach track.
6.7.3.2.10 Radar monitoring shall not be terminated until:
a) visual separation is applied, provided procedures
ensure that both radar controllers are advised whenever
visual separation is applied;
b) the aircraft has landed, or in case of a missed approach,
is at least 2 km (1.0 NM) beyond the departure end of
the runway and adequate separation with any other
traffic is established.
Note.— There is no requirement to advise the aircraft that
radar monitoring is terminated.
6.7.3.3 SUSPENSION OF INDEPENDENT PARALLEL
APPROACHES TO CLOSELY-SPACED PARALLEL RUNWAYS
Independent parallel approaches to parallel runways spaced by
less than 1 525 m between their centre lines shall be suspended
under certain weather conditions, as prescribed by the
appropriate ATS authority, including windshear, turbulence,
downdrafts, crosswind and severe weather such as thunderstorms,
which might otherwise increase ILS localizer course
and/or MLS final approach track deviations to the extent that
safety may be impaired.
Note 1.— The increase in final approach track deviations
would additionally result in an unacceptable level of deviation
alerts being generated.
Note 2.— Guidance material relating to weather
conditions is contained in the Manual on Simultaneous
Operations on Parallel or Near-Parallel Instrument Runways
(Doc 9643).*
6.7.3.4 REQUIREMENTS AND PROCEDURES FOR DEPENDENT
PARALLEL APPROACHES
6.7.3.4.1 Dependent parallel approaches may be
conducted to parallel runways provided:
a) the runway centre lines are spaced by the distance
specified in Annex 14, Volume I;
b) the aircraft are radar vectored to intercept the final
approach track;
c) suitable surveillance radar with a minimum azimuth
accuracy of 0.3 degrees (one sigma) and update period
of 5 seconds or less is available;
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