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Basis: Comparison to a high-density continental
reference system (VOR spacing) as described in
Attachment A; and
Minimum ATS requirements:
NAV — All aircraft need RNP type 5 approval
appropriate for the routes/tracks to be flown, and the
NAVAID infrastructure must be provided sufficient to
support RNP 5 operations
COM — Direct VHF controller/pilot voice
communications
SUR — Procedural-pilot position reports.
Note 1.— Guidance material relating to the use of
RNP 5 is contained in the Manual on Required
Navigation Performance (RNP) (Doc 9613).
Note 2.— This spacing was not developed for
applicability in remote and/or oceanic airspace where
an appropriate VOR infrastructure is not available.
3.4.2 For radar environments:
a) RNP 4
Spacing: 14.8-22.2 km (8-12 NM);
Basis: Comparison to a reference system — containment
areas, determined in accordance with 2.2.1, do not
overlap; and
Minimum ATS requirements:
NAV — All aircraft need at least RNP type 4 approval
appropriate for the routes/tracks to be flown, and the
NAVAID infrastructure must be provided sufficient to
support RNP 4 operations
COM — Direct VHF controller/pilot voice
communications
SUR — Radar which meets existing standards
Other — System safety, including controller workload,
must be evaluated.
b) RNP 5
Spacing: 18.5-27.8 km (10-15 NM);
Basis: Comparison to a reference system — containment
areas, adapted from the provisions of 2.2.1 above to
reflect RNP 5, do not overlap; and
Minimum ATS requirements:
NAV — All aircraft need at least RNP type 5
appropriate for the routes/tracks to be flown, and the
NAVAID infrastructure must be provided sufficient to
support RNP 5 operations
COM — Direct VHF controller/pilot voice
communications
SUR — Radar which meets existing standards
Other — System safety, including controller workload,
must be evaluated.
ANNEX 11 ATT C-1 1/11/01
ATTACHMENT C. TRAFFIC INFORMATION BROADCASTS BY
AIRCRAFT (TIBA) AND RELATED OPERATING PROCEDURES
(See Chapter 4, 4.2.2, Note 2)
1. Introduction and applicability
of broadcasts
1.1 Traffic information broadcasts by aircraft are intended
to permit reports and relevant supplementary information of an
advisory nature to be transmitted by pilots on a designated
VHF radiotelephone (RTF) frequency for the information of
pilots of other aircraft in the vicinity.
1.2 TIBAs should be introduced only when necessary and
as a temporary measure.
1.3 The broadcast procedures should be applied in
designated airspace where:
a) there is a need to supplement collision hazard information
provided by air traffic services outside controlled
airspace; or
b) there is a temporary disruption of normal air traffic
services.
1.4 Such airspaces should be identified by the States
responsible for provision of air traffic services within these
airspaces, if necessary with the assistance of the appropriate
ICAO Regional Office(s), and duly promulgated in aeronautical
information publications or NOTAM, together with
the VHF RTF frequency, the message formats and the
procedures to be used. Where, in the case of 1.3 a), more than
one State is involved, the airspace should be designated on the
basis of regional air navigation agreements and promulgated
in Doc 7030.
1.5 When establishing a designated airspace, dates for the
review of its applicability at intervals not exceeding 12 months
should be agreed by the appropriate ATS authority(ies).
2. Details of broadcasts
2.1 VHF RTF frequency to be used
2.1.1 The VHF RTF frequency to be used should be
determined and promulgated on a regional basis. However, in
the case of temporary disruption occurring in controlled
airspace, the States responsible may promulgate, as the VHF
RTF frequency to be used within the limits of that airspace, a
frequency used normally for the provision of air traffic control
service within that airspace.
2.1.2 Where VHF is used for air-ground communications
with ATS and an aircraft has only two serviceable VHF sets,
one should be tuned to the appropriate ATS frequency and the
other to the TIBA frequency.
2.2 Listening watch
A listening watch should be maintained on the TIBA
frequency 10 minutes before entering the designated airspace
until leaving this airspace. For an aircraft taking off from an
aerodrome located within the lateral limits of the designated
airspace listening watch should start as soon as appropriate
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