performance based navigation -...

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Performance Based Navigation for Regional Operations

By Géraud de RIVALS-MAZERES

Regional Flight Safety Director, ATR

Independent │Non-profit | Innovative

• 2nd flight of the day with the same route and the same crew

• No IFR approach published

• Crew reported a straight in approach direct left base

• Reported weather:

– visibility 4 to 5000m

– broken 8000ft

Crew reported

overhead 11,500

ft

Aircraft final

trajectory and

impact at 8300 ft

A/L published

guidance for

visual approach

Case Study

2


Controlled Flight Into Terrain (CFIT):

• responsible for 37% fatal accidents (2011 – 2015)

• Most occur in approach/landing phases

• Often associated with loss of situational awareness

IATA Safety Report 2015

Regional operations:

• > 3450 airports

• 82% visual approach only (*) (*) one major ATR operator in Asia

3


PBN in Africa source: ICAO

4


5

Airports operated by ATRs (near Zambia)

29% no published instrumented approach

At least 1 instrumented approach

No instrumented approach


6


Navigation aids

ILS

VOR

DME

NDB GNSS

7


Safety barriers (non exhaustive list)

8


PBN

ATR

Operators

Author-ities

ICAO

Training Agencies

drives industry coordination

Each stakeholder is key

9


Take off and Climb (SID) Cruise (En Route Navigation) Descent (STAR)

Approach Go Around

VNAV

LPV

RNP AR

LNAV

TOC TOD IAF FAF / MAPt

VNAV

LNAV

VNAV

LNAV

VNAV

RNP AR

LNAV

VNAV

RNP AR

LNAV

RNP AR

Where are the PBN benefits ?

10


RNP AR VNAV

LPV

LNAV

Where are the PBN benefits ?

Lower minima

11


PBN’s rationale

Improve Safety

Enhance Navigation

Optimize Air Traffic

Increase Airport Accessibility

turns 2D into 3D VNAV PBN

RNP AR Complex 3D profiles

LNAV turns VFR into IFR

12


13 VOR

Lateral guidance from Top Of Descent Vertical guidance / indication Continuous Descent Final Approach

(=> improve stabilization) Lower minima

VNAV LNAV


ATR Specificities

14


• PBN provides safety benefits

• Each stakeholder is key!

• ATR can support each implementation step

Conclusion

15


VFR IFR PBN

When do you start?

16


17

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