曝光台 注意防骗
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elevation information and guidance.
8.9.7.2.7 TERMINATION OF A PRECISION RADAR APPROACH
A precision radar approach is terminated when the aircraft
reaches the point at which the glide path intercepts the obstacle
clearance altitude/height. Nevertheless, information shall
continue to be given until the aircraft is over the threshold, or
at such distance therefrom as may be specified by the
appropriate ATS authority, taking into account the capability
of the equipment concerned. The approach may be monitored
to touchdown and information may continue to be provided as
necessary at the discretion of the radar controller in charge of
the precision approach in which case the aircraft shall be
informed when it is over the threshold.
8.9.7.2.8 MISSED APPROACHES
When information provided by the elevation element indicates
that the aircraft may be initiating a missed approach, the radar
controller shall take the following action:
a) when there is sufficient time to obtain a reply from the
pilot (e.g. when the aircraft is more than 4 km (2 NM)
from touchdown), the radar controller shall transmit
the aircraft’s height above the glide path and ask if the
pilot intends to make a missed approach. If this is
confirmed by the pilot, the radar controller shall pass
missed approach instructions (see 8.9.6.1.8);
b) when there is not sufficient time to obtain a reply from
the pilot (e.g. when the aircraft is at 4 km (2 NM) or
less from touchdown) the precision approach should
be continued, emphasizing the aircraft’s displacement,
and terminated at the normal termination point. If it is
apparent from elevation information that the aircraft is
making a missed approach, either before or after the
normal termination point, the radar controller shall
pass missed approach instructions (see 8.9.6.1.8).
8.10 USE OF RADAR IN THE
AERODROME CONTROL SERVICE
8.10.1 Surveillance radar
8.10.1.1 When authorized by and subject to conditions
prescribed by the appropriate ATS authority, surveillance
radar may be used in the provision of aerodrome control
service to perform the following functions:
a) radar monitoring of aircraft on final approach;
b) radar monitoring of other aircraft in the vicinity of the
aerodrome;
c) establishing radar separation between succeeding
departing aircraft; and
d) providing navigation assistance to VFR flights.
Chapter 8. Radar Services 8-21
1/11/01
8.10.1.2 Special VFR flights shall not be radar vectored
unless special circumstances, such as emergencies, dictate
otherwise.
8.10.1.3 Caution shall be exercised when radar vectoring
VFR flights so as to ensure that the aircraft concerned does not
inadvertently enter instrument meteorological conditions.
8.10.1.4 In prescribing conditions and procedures for the
use of radar in the provision of aerodrome control service, the
appropriate ATS authority shall ensure that the availability
and use of radar information will not be detrimental to visual
observation of aerodrome traffic.
Note.— Control of aerodrome traffic is in the main based
on visual observation of the manoeuvring area and the vicinity
of the aerodrome by the aerodrome controller.
8.10.2 Use of surface movement radar (SMR)
Note.— Requirements concerning the provision of SMR
are contained in Annex 14, Volume I, Chapter 8. Guidance
material on the use of SMR is contained in the Air Traffic
Services Planning Manual (Doc 9426), Part II.
8.10.2.1 GENERAL PROVISIONS
8.10.2.1.1 The use of SMR should be related to the
operational conditions and requirements of the particular aerodrome
(i.e. visibility conditions, traffic density and aerodrome
layout).
8.10.2.1.2 SMR systems shall to the extent possible
enable the detection and display of the movement of all
aircraft and vehicles on the manoeuvring area in a clear and
unambiguous manner.
8.10.2.1.3 Aircraft and vehicle radar position indications
may be displayed in symbolic or non-symbolic form. Where
radar labels are available for display, the capability should be
provided for inclusion of aircraft and vehicle identification by
manual or automated means.
8.10.2.2 FUNCTIONS
8.10.2.2.1 SMR should be used to augment visual
observation of traffic on the manoeuvring area and to provide
surveillance of traffic on those parts of the manoeuvring area
which cannot be observed visually.
8.10.2.2.2 The information displayed on an SMR display
may be used to assist in:
a) monitoring of aircraft and vehicles on the manoeuvring
area for compliance with clearances and instructions;
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