required navigation performance

RNAV1Federal Aviation

AdministrationJuly 14, 2008

GENERAL RNAV

RNP DME-DME

WAAS

RNAV Main Menu

Presented to:

By:

Date:

Federal AviationAdministrationAREA NAVIGATION

(RNAV)

Section 2,

Required Navigation Performance (RNP)

Flight Inspection Crewmembers

AJW-3310

July 14, 2008



RNP Introduction

• Required Navigation Performance (RNP) is defined by ICAO as "a statement of the navigation performance necessary for operation within a defined airspace".

• Part of a broader concept called "Performance-based Navigation“:– RNP is a method of implementing routes and flight paths that

differs from previous methods in that not only does it have an associated performance specification that an aircraft must meet before the path can be flown but must also monitor the achieved performance and provide an alert in the event that this fails to meet the specification.



RNP Introduction

• It is the monitoring and alerting facility that distinguishes RNP from RNAV (Area Navigation) from which it developed.

• RNP equipped aircraft can safely operate routes with less separation than previously required which is significant because it increases the number of aircraft that can safely use a particular airspace and therefore accommodate the increasing demand for air traffic capacity.



RNP Introduction

• RNP is a statement of the navigation performance accuracy necessary for operation within a defined airspace.

• Stated as a number in nautical miles.• Specifies how “tight” the avionics must

contain Total System Error (TSE).• Applies to NAV performance; includes the

capability of the NAV system and aircraft equipment.



RNP Introduction

• AC RNP capability varies per AC equipment and navigation infrastructure.

• RNP levels address obstacle protection per RNP accuracy values; determines primary obstacle area .

Presented to:

By:

Date:

Federal AviationAdministrationRequired Navigation

Performance (RNP)

Approaches


AJW-3310

July 14, 2008



RNP Approaches

• Allow for more efficient routings.• Decision Altitude (DA) as low as 250 ft

above touchdown.• Allow for “Radius-to-Fix” paths.• Non-published approaches to be

commissioned (previously LNAV - VNAV, LPV, and now RNP), are loaded into the FMS either by hand, or electronically.



RNP Approaches

• RNAV procedures may be coded with an office computer/ software, placed on media, and uploaded into the FMS.

• The LNAV, LNAV-VNAV, and the RNP RNAV approaches are selected in the FMS as VFR approaches.

• The LPV is the ‘ONLY’ approach referred to as GPS WAAS System (GWS) in the FMS.



RNP Approaches

• The approach segments will be discussed in sequence. – Enroute– Terminal– Final– Missed Approach

• The transitions are identical to the LNAV-VNAV “approach building” in the FMS.



RNP Approaches

FMS Arrival Segments• Parameters within the FMS change depending on

the phase or mode of flight, and changes between flight modes activate certain actions.

• There are three arrival segments:– Enroute (RNP of 2.8)– Terminal (RNP of 1.0)– Approach (RNP of 0.3)

• Special Aircraft & Aircrew Authorization Required (SAAAR) (RNP < 0.3)



RNP Approaches

• Navigation Sensors– The GPS sensor is used to provide

navigation guidance for the RNP approach.

Presented to:

By:

Date:

Federal AviationAdministrationRequired Navigation

Performance (RNP)

Flight Inspection Procedures


AJW-3310

July 14, 2008



Flight Inspection Procedures

• Inspect RNP RNAV approaches per the General RNAV, TI 8200.52, Chapter 13, Section I procedures

• Use the following guidance, procedure design, and obstacle clearance criteria:– FAA Order 8260.51, U.S. Standard for RNP

Instrument Approach Procedure Construction – FAA Order 8260.52, U.S. Standard for RNP

Instrument Approach Procedures with Special Aircraft and Aircrew Authorization Required (SAAAR).



Obstacle Verification

• When containment obstacle verification is required:– Fly a 2xRNP (containment limit) offset each side of

centerline.– Fly in the intended direction of the procedure.– Program the offset as a route or approach in the

FMS.– Assign altitudes to the offset WPs as required for the

vertical profile.



RNP SIAP



GENERAL RNAV

RNP DME-DME

WAAS

RNAV Main Menu

required navigation performance

Documents

rnp introduction rnp

rnp rnav approaches

approach rnp

rnp siap rnav

rnp approaches rnav

saaar rnp

terminal rnp

enroute rnp