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Required Navigation Performance-10 (RNP-10)

Normal Procedures: Airspace

 


 

Inconsistent RNP Designation

[ICAO Doc 9613, Volume I, Part A, ¶1.2.5.1] The existing RNP 10 designation is inconsistent with PBN RNP and RNAV specifications. RNP 10 does not include requirements for on-board performance monitoring and alerting. For purposes of consistency with the PBN concept, RNP 10 is referred to as RNAV 10 in this manual. Renaming current RNP 10 routes, operational approvals, etc., to an RNAV 10 designation would be an extensive and expensive task, which is not cost-effective. Consequently, any existing or new operational approvals will continue to be designated RNP 10, and any charting annotations will be depicted as RNP 10.

Location

Africa

[ICAO Doc 7030, §AFI, ¶4.1.1]

  • For flights on designated controlled oceanic routes or areas within the Canarias FIR (southern sector), Dakar Oceanic, Recife and Sal Oceanic FIRs, and on designated routes over continental Africa, a lateral separation minimum of 93 km (50 NM) may be applied.
  • For flights in the EUR/SAM corridor (Canarias (southern sector), Dakar Oceanic, Recife and Sal Oceanic FIRs), a longitudinal separation minimum of 93 km (50 NM) derived by RNAV may be applied between RNAV-equipped aircraft approved to RNP 10 or better, in accordance with the provisions of the PANS-ATM, 5.4.2.6.
  • PANS-ATM require direct controller-pilot communications and a position report every 24 minutes.

  • Longitudinal distance-based separation minima of 93 km (50 NM) between RNAV aircraft on the same track on RNP 10 routes over continental Africa shall not be used.

Asia

[ICAO Doc 7030, §MID/ASIA, ¶4.1.1]

  • For flights on designated controlled oceanic routes or areas within the Auckland Oceanic, Brisbane, Fukuoka, Honiara, Melbourne, Nauru, New Zealand and Port Moresby FIRs, a lateral separation minimum of 93 km (50 NM) may be applied.
  • For flights on designated controlled oceanic routes or areas within the Auckland Oceanic, Brisbane, Fukuoka, Honiara, Melbourne, Nauru, New Zealand and Port Moresby FIRs, a longitudinal separation minimum of 93 km (50 NM) derived by RNAV may be applied between RNAV-equipped aircraft approved to RNP 10 or better, in accordance with the provisions of the PANS-ATM, 5.4.2.6.
  • PANS-ATM require direct controller-pilot communications and a position report every 24 minutes.

Pacific

[ICAO Doc 7030, §PAC, ¶4.1.1]

  • For flights on designated controlled oceanic routes or areas within the Anchorage Arctic, Anchorage Continental, Anchorage Oceanic, Auckland Oceanic, Nadi, Oakland Oceanic and Tahiti FIRs, a lateral separation minimum of 93 km (50 NM) may be applied.
  • For flights on designated controlled oceanic routes or areas within the Anchorage Arctic, Anchorage Continental, Anchorage Oceanic, Auckland Oceanic, Nadi, Oakland Oceanic and Tahiti FIRs, a longitudinal separation minimum of 93 km (50 NM) derived by RNAV may be applied between RNAV-equipped aircraft approved to RNP 10 or better, in accordance with the provisions of the PANS-ATM, 5.4.2.6.
  • PANS-ATM require direct controller-pilot communications and a position report every 24 minutes.

South America

[ICAO Doc 7030, §SAM, ¶4.1.1]

  • For flights on designated controlled oceanic routes or areas within the Canarias FIR (southern sector), Dakar Oceanic, Recife and Sal Oceanic FIRs a lateral separation minimum of 93 km (50 NM) may be applied.
  • For flights in the EUR/SAM corridor (Canarias (southern sector), Dakar Oceanic, Recife and Sal Oceanic FIRs), a longitudinal separation minimum of 93 km (50 NM) derived by RNAV may be applied between RNAV-equipped aircraft approved to RNP 10 or better, in accordance with the provisions of the PANS-ATM, 5.4.2.6.
  • PANS-ATM require direct controller-pilot communications and a position report every 24 minutes.

RNAV Provisions

[ICAO Doc 4444, ¶5.4.2.6] LONGITUDINAL SEPARATION MINIMA BASED ON DISTANCE USING RNAV WHERE RNP IS SPECIFIED

5.4.2.6.2.2 Direct controller-pilot communications shall be maintained while applying a distance-based separation minima. Direct controller-pilot communications shall be voice or CPDLC. The communication criteria necessary for CPDLC to satisfy the requirement for direct controller-pilot communications shall be established by an appropriate safety assessment.

5.4.2.6.3 Longitudinal distance-based separation minima in an RNP RNAV environment not using ADS

5.4.2.6.3.1 For aircraft cruising, climbing or descending on the same track, the following separation minimum may be used:

Separation minimum RNP type Communication requirement Surveillance requirement Distance verification requirements
93 km (50NM) 10 Direct controller-pilot communications Procedure position reports At least every 24 minutes

Accuracy / Performance Standards

[ICAO Doc 9613, Volume II, Part C,¶1.3.4.1]

  • Accuracy: During operations in airspace or on routes designated as RNP 10, the lateral total system error must be within ±10 NM for at least 95 per cent of the total flight time. The along-track error must also be within ±10 NM for at least 95 per cent of the total flight time.
  • Note 1.— For RNP 10, operational approval of aircraft capable of coupling the area navigation (RNAV) system to the flight director or autopilot, a navigational positioning error is considered to be the dominant contributor to cross-track and along-track error. Flight technical error, path definition error and display errors are considered to be insignificant for the purposes of RNP 10 approval.

    Note 2.— When the data collection method described in Appendix 1 of FAA Order 8400.12A (as amended) is used as the basis for an RNP 10 operational approval, these error types are included in the analysis. However, when the data collection method described in Appendix 6 of FAA Order 8400.12A is used, these errors are not included since that method is more conservative. The Appendix 6 method uses radial error instead of cross-track and along-track error.

  • Integrity: Malfunction of the aircraft navigation equipment is classified as a major failure condition under airworthiness regulations (i.e. 10–5 per hour).
  • Continuity: Loss of function is classified as a major failure condition for oceanic and remote navigation. The continuity requirement is satisfied by the carriage of dual independent LRNSs (excluding signal-in-space).
  • Signal-in-space: If using GNSS, the aircraft navigation equipment shall provide an alert if the probability of signal-in- space errors causing a lateral position error greater than 20 NM exceeds 10–7 per hour.

Documentation / Certification

Determining Eligibility of Aircraft

FAA Order 8400.12A was written in 1998 and details an extensive process to determine aircraft eligibility. The process has pretty much aligned itself with other RNP approvals; an AFM statement seems to suffice.

14 CFR 91

[FAA Order 8400.12A, ¶8.b.(2)] These operators should contact their local FSDO to start the process for RNP-10 authorization. Operators under part 91 will receive an LOA, which authorizes RNP-10 operations. The LOA will identify any conditions or limitations necessary (e.g., navigation systems or procedures required, time limits, routes or areas authorized).

14 CFR 135

[FAA Order 8400.12A, ¶8.b.(1)] These operators should notify the Certificate Management Office (CMO) or CHDO which holds its operating certificate of its intent to request approval for RNP-10 operations. RNP-10 authorizations for air carriers will be addressed through issuance of approved operations specifications. The operations specifications will identify any conditions or limitations necessary (e.g., navigation systems or procedures required, time limits, routes or areas authorized).

Example Compliance

Under 14 CFR 91 you will need an LOA.

images

Figure: Example RNP-10 LOA Extract, from Eddie's sordid past.

Under 14 CFR 135, you will also need OpSpecs B037 and B038:

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Figure: Example OpSpec B037 Extract, from Eddie's sordid past.

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Figure: Example OpSpec B038 Extract, from Eddie's sordid past.

Book Notes

Portions of this page can be found in the book International Flight Operations, Part III, Chapter 10.

References

14 CFR 71, Title 14: Aeronautics and Space, Designation of Class A, B, C, D, and E Airspace Areas; Air Traffic Service Routes, and Reporting Points, Federal Aviation Administration, Department of Transportation

Aeronautical Information Manual

ICAO Annex 11 - Air Traffic Services, International Standards, Annex 11 to the Convention on International Civil Aviation, July 2001

FAA Orders 8400 and 8900

FAA Order 8400.33, Procedures for Obtaining Authorization for Required Navigation Performance 4 (RNP-4) Oceanic and Remote Area Operations, U.S. Department of Transportation, 9/15/05

ICAO Doc 4444 - Air Traffic Management, Fourteenth Edition, Procedures for Air Navigation Services, International Civil Aviation Organization, 2001 *

ICAO Doc 4444 - Air Traffic Management, Fifteenth Edition, Procedures for Air Navigation Services, International Civil Aviation Organization, 2007 *

* Not all of Doc 4444 seems to have been reproduced in the 15th edition, so you might need to look at the 15th edition and then then 14th edition for some sections.

ICAO Doc 4444 - Amendment No. 1, Procedures for Air Navigation Services, International Civil Aviation Organization, Amendment No. 1, 2007

ICAO Doc 4444 - Amendment No. 2, Procedures for Air Navigation Services, International Civil Aviation Organization, Amendment No. 2, 19/11/09

ICAO Doc 7030 - Regional Supplementary Procedures, International Civil Aviation Organization, 2008

ICAO Doc 9613 - Performance Based Navigation (PBN) Manual, International Civil Aviation Organization, 2008

Revision: 20140204
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