Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 2826

e) RNP 4 Spacing: 55.5 km (30 NM); Basis 1: Safety assessment performed by the United States Federal Aviation Administration based on analysis of acceptable rate of gross lateral errors in a parallel route system using 55.5 km (30 NM) track spacing while meeting a target level of safety of 5 × 10–9 fatal accidents per flight hour. Basis 2: Minimum requirements for communications and surveillance listed below are operationally necessary to manage contingency and emergency events in a 55.5 km (30 NM) route system. Note.— Further information on the safety assessment performed is contained in the Manual on Airspace Planning Methodology for the Determination of Separation Minima (Doc 9689). Minimum ATS requirements: NAV — RNP 4 shall be prescribed for the designated area, tracks or ATS routes COM — Direct controller-pilot voice communications or controller-pilot data link communications (CPDLC) SUR — An ADS-C system in which an event contract must be set that includes a lateral deviation event report whenever a deviation from track centre line greater than 9.3 km (5 NM) occurs. Other — Prior to implementation, a system verification of sufficient duration and integrity shall be performed to demonstrate that the maximum acceptable rate of lateral deviations greater than or equal to 27.8 km (15 NM) will not exceed those listed in Table B-1 and that the system meets operational and technical requirements. The verification should be conducted after the minimum navigation, communications and surveillance requirements listed above have been met. Following implementation, a 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 should first decide which of the four system descriptions applies in the airspace under consideration. If the system is not identical to one of the four cases described in Table B-1, the planner should conservatively interpolate between the cases by taking from the two cases that resemble the system, the one with the lower lateral deviation rate. Next, select from the first column, the value of system lateral occupancy that the system is not expected to exceed over the planning horizon. By reading the table at the row and column selected, the airspace planner obtains the value of the lateral deviation rate that should not be exceeded in the system to meet the TLS of 5 × 10–9 fatal accidents per flight hour. 22/11/07 No. 45 Annex 11 — Air Traffic Services Attachment B 1/11/01 ATT B-4 28/11/02 No. 41 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-C and CPDLC are contained in the PANS-ATM (Doc 4444), Chapters 13 and 14, respectively. Criteria for CPDLC and ADS-C 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 and/or oceanic airspace where an appropriate VOR infrastructure is not available. Note 5.— In this material, lateral occupancy means a number equal to twice the number of laterally 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), Part II, Chapter 4, Appendices A and C. 3.4.2 For radar environments:

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