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NAV - All aircraft need RNP type 5 approval gation, communications and surveillance requirements
appropriate for the routesltracks to be flown, and the listed above have been met. Following implementation, a
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).
monitoring programme must be established to periodically
verify that the system's actual rate of lateral
deviations greater than or equal to 27.8 km (15 NM) does
not exceed the maximum prescribed in Table B-1
(information pertaining to monitoring can be found in the
Manual on Airspace Planning Methodology for the
Determination of Separation Minima (Doc 9689),
Chapter 8.
Note 1.- The airspace planner shouldjrst decide which of
the four system descriptions applies in the airspace under
consideration. If the system is not identical to one of the four
Note 2.- This spacing was not developed for cases described in Table B-1, the planner should conservaapplicability
in remote anaYor oceanic airspace where tively interpolate between the cases by taking from the two
an appropriate VOR infrastructure is not available. cases that resemble the system, the one with the lower lateral
deviation rate. Next, select from the jrst column, the value of
e) RNP 4 system lateral occupancy that the system is not expected to
exceed over the planning horizon. By reading the table at the
Spacing: 55.5 km (30 NM); row and column selected, the airspace planner obtains the
value of the lateral deviation rate that should not be exceeded
Basis I : Safety assessment performed by the United in the system to meet the TLS of 5 x fatal accidents per
States Federal Aviation Administration based on analysis jlight hour:
ATT B-3
Annex 11 - Air Traffic Services Attachment B
Note 2.- Lateral deviations that should be considered for
the purposes of assessing the system safety are any deviation
from track of a magnitude greater than or equal to 27.8 km
(15 NM) which are not associated with the execution of an
approved contingency procedure.
Note 3.- Procedures pertaining to the use of ADS
and CPDLC are contained in the PANS-ATM (Doc 4444).
Chapters 13 and 14, respectively Criteria for CPDLC and
ADS should be established by an appropriate safety
assessment. Information on safety assessments is contained in
the Manual on Airspace Planning Methodology for the
Determination of Separation Minima (Doc 9689).
Note 4.- This spacing was developed for applicability in
remote a d o r oceanic airspace where an appropriate VOR
infrastmcture is not available.
Note 5.- In this material, lateral occupancy means a
number equal to twice the number of latemlly proximate pairs
of aircraft divided by the total number of aircraft. A detailed
explanation of the terms used in collision risk modelling is
contained in the Air Traffic Services Planning Manual
(Doc 9426) Pan 11, Chapter 4, Appendices A and C.
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 routesltracks to be flown, and the
NAVAID infrastructure must be provided sufficient to
support RNP 4 operations
COM - Direct VHF controllerlpilot 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 routesltracks to be flown, and the
NAVAID infrastructure must be provided sufficient to
support RNP 5 operations
COM - Direct VHF controllerlpilot voice communications
SUR - Radar which meets existing standards
Other - System safety, including controller workload,
must be evaluated.
28/11102
No. 41
ATT B-4
Attachment B Annex 11 -Air Traffic Services
Table B-1. Maximum acceptable rates of lateral deviations
greater than or equal to 27.8 km (15 NM)
ATT B-5
Maximum expected
route system lateral
occupancy
0.1
0.2
　
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